NFPA RATING
FLAMMABILITY
0
2
3
HEALTH REACTIVITY
MATERIAL SAFETY DATA SHEET W
Prepared to U.S. OSHA, CMA, ANSI and Canadian WHMIS Standards
OTHER
PART I What is the material and what do I need to know in an emergency?
1. PRODUCT IDENTIFICATION
SILICON TETRACHLORIDE - SiCl4
CHEMICAL NAME; CLASS:
Document Number: 001075
PRODUCT USE: For general analytical/synthetic chemical uses.
SUPPLIER/MANUFACTURER'S NAME: AIRGAS INC.
ADDRESS: 259 N. Radnor-Chester Road
Suite 100
Radnor, PA 19087-5283
BUSINESS PHONE: 1-610-687-5253
EMERGENCY PHONE: CHEMTREC: 1-800-424-9300
International: 703-527-3887 (Call Collect)
DATE OF PREPARATION: May 18, 1998
2. COMPOSITION and INFORMATION ON INGREDIENTS
CHEMICAL NAME CAS # mole % EXPOSURE LIMITS IN AIR
ACGIH OSHA
TLV STEL PEL STEL IDLH OTHER
ppm ppm ppm ppm ppm
Silicon Tetrachloride 10026-04-7 > 99% NE C5 NE C5 50 NIOSH REL:
C = 0.5 ppm
There are no specific
exposure limits for
DFG MAK = 0.5 ppm
Silicon Tetrachloride.
The following exposure
Carcinogen:
limits are for Hydrogen
IARC-3
Chloride, which is a
decomposition product
of this liquid.
Maximum Impurities < 1% None of the trace impurities in this mixture contribute significantly to the hazards
associated with the product. All hazard information pertinent to this product has been
provided in this Material Safety Data Sheet, per the requirements of the OSHA
Hazard Communication Standard (29 CFR 1910.1200) and State equivalent
standards.
NE = Not Established C = Ceiling Limit See Section 16 for Definitions of Terms Used
NOTE: All WHMIS required information is included. It is located in appropriate sections based on the ANSI Z400.1-1993 format.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 1 OF 9
3. HAZARD IDENTIFICATION
EMERGENCY OVERVIEW: Silicon Tetrachloride is a pungent-smelling, toxic, corrosive, colorless to light-yellow
liquid, which has a suffocating odor. Silicon Tetrachloride fumes in moist air, producing a dense, white cloud of
hydrochloric acid mist. This gas is not flammable. When Silicon Tetrachloride is in contact with water or moist air, this
substance will react vigorously and hydrochloric acid will be generated. Persons who respond to releases of this product
must protect themselves from inhalation of the vapors, gases and mists generated from this substance (especially in
areas which are downwind of the release). The vapor of this product is heavier than air, and pockets of this gas can
accumulate in low-lying areas. Extreme caution must be used when responding to releases.
SYMPTOMS OF OVEREXPOSURE BY ROUTE OF EXPOSURE: The
most significant routes of occupational overexposure to this product are HAZARDOUS MATERIAL INFORMATION
inhalation and contact with skin and eyes. The symptoms of SYSTEM
overexposure to this product, via route of entry, are as follows:
HEALTH
INHALATION: If the vapors, mists or sprays of Silicon Tetrachloride are 3
(BLUE)
inhaled, symptoms of exposure may include breathing difficulty, irritation
of the mucus membranes, coughing, nasal congestion, and a sore
throat. Damage to the tissues of the respiratory system may also occur,
especially after prolonged exposures or exposures to high
FLAMMABILITY 0
(RED)
concentrations of Silicon Tetrachloride. Severe inhalation over-
exposures can lead to chemical pneumonitis, pulmonary edema, and
death. Chronic inhalation exposures may result in dental erosion and
perforation of the nasal septum.
REACTIVITY (YELLOW)
CONTACT WITH SKIN or EYES: Contact with the eyes will cause 2
severe irritation, pain, reddening, watering, and possibly, blindness.
Depending on the duration of skin contact, skin overexposures may
cause reddening, discomfort, severe irritation, and chemical burns.
PROTECTIVE EQUIPMENT X
Chemical burns result in blistering of the skin and possible scarring.
Repeated skin-overexposures to low concentrations can result in
dermatitis (inflammation and reddening of the skin). EYES HANDS BODY
RESPIRATORY
SKIN ABSORPTION: Skin absorption is not a significant route of over-
exposure for Silicon Tetrachloride. SEE SECTION 8
INGESTION: Ingestion is not anticipated to be a likely route of
occupational exposure to this product. If ingestion does occur, severe
For routine industrial applications
irritation and burns of the mouth, throat, esophagus, and other tissues of
the digestive system will occur immediately upon contact. Symptoms of
such over-exposure can include nausea, vomiting, diarrhea. Ingestion See Section 16 for Definition of Ratings
of large volumes of this product may be fatal.
INJECTION: Injection is not anticipated to be a significant route of overexposure for this product. Injection of this product
(via puncture with a contaminated object) can cause pain, severe irritation, and burns, in addition to the wound.
HEALTH EFFECTS OR RISKS FROM EXPOSURE (An explanation in lay terms).
ACUTE: Silicon Tetrachloride is corrosive. Depending on the duration of contact, over-exposures can severely irritate or
burn the eyes, skin, mucous membranes, and any other exposed tissue. If inhaled, irritation of the respiratory system may
occur, with coughing, and difficulty breathing. Skin contact can cause blisters and scars. Eye contact can cause blindness.
Severe inhalation, contact, and ingestion over-exposures may be fatal.
CHRONIC: Dermatitis (inflammation and redness of the skin) may occur after chronic, low-level skin contact. Prolonged
inhalation of the vapors may lead to dental erosion, nasal perforation, and respiratory disorders (e.g., bronchitis). Refer to
Section 11 (Toxicology Information) for additional information on this product鈥檚
TARGET ORGANS: Respiratory system, skin, eyes, teeth.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 2 OF 9
PART II What should I do if a hazardous situation occurs?
4. FIRST-AID MEASURES
RESCUERS SHOULD NOT ATTEMPT TO RETRIEVE VICTIMS OF EXPOSURE TO SILICON TETRACHLORIDE
WITHOUT ADEQUATE PERSONAL PROTECTIVE EQUIPMENT. Self-Contained Breathing Apparatus and
Personal Protective equipment may be required.
SKIN EXPOSURE: If this product contaminates the skin, immediately begin decontamination with copious amounts of
running water running water. Minimum flushing is for 15 minutes. Remove exposed or contaminated clothing, taking care
not to contaminate eyes. Victim must seek immediate medical attention.
EYE EXPOSURE: If this product's liquid or vapors enter the eyes, open victim's eyes while under copious amounts of
gently running water. Use sufficient force to open eyelids. Have victim "roll" eyes. Minimum flushing is for 15 minutes.
Victim must seek immediate medical attention.
INHALATION: If vapors, mists, or sprays of this product are inhaled, remove victim to fresh air. If necessary, use artificial
respiration to support vital functions. Remove or cover gross contamination to avoid exposure to rescuers.
INGESTION: If this product is swallowed, CALL PHYSICIAN OR POISON CONTROL CENTER FOR MOST CURRENT
INFORMATION. If professional advice is not available, do not induce vomiting. Victim should drink milk, egg whites, or
large quantities of water. Never induce vomiting or give diluents (milk or water) to someone who is unconscious, having
convulsions, or unable to swallow.
Victims of chemical exposure must be taken for medical attention. Rescuers should be taken for medical attention, if
necessary. Take a copy of label and MSDS to health professional with victim.
5. FIRE-FIGHTING MEASURES
FLASH POINT: Not applicable.
AUTOIGNITION TEMPERATURE: Not applicable.
FLAMMABLE LIMITS (in air by volume, %):
NFPA RATING
Lower (LEL): Not applicable.
FLAMMABILITY
Upper (UEL): Not applicable.
FIRE EXTINGUISHING MATERIALS:
0
Water Spray: YES Carbon Dioxide: YES Foam: YES
2
Dry Chemical: YES Halon: YES Other: Any "ABC鈥? Class. 3
HEALTH REACTIVITY
UNUSUAL FIRE AND EXPLOSION HAZARDS: Silicon Tetrachloride is a water-
W
reactive, corrosive liquid which poses a severe health hazard to firefighters. When
Silicon Tetrachloride is in contact with water or moist air, a small amount of heat will
be released and hydrochloric acid will be generated. Large volume releases which OTHER
See Section 16 for Definition of
come into contact with metal vigorously generate produce hydrogen gas.
Ratings
Containers of his substance, when involved in fire, may rupture or burst in the heat
of the fire.
Explosion Sensitivity to Mechanical Impact: Not Sensitive.
Explosion Sensitivity to Static Discharge: Not Sensitive.
SPECIAL FIRE-FIGHTING PROCEDURES: Structural fire-fighters must wear Self-Contained Breathing Apparatus and full
protective equipment. Move fire-exposed cylinders if it can be done without risk to firefighters. Withdraw immediately in
case of rising sounds from venting safety device or any discoloration of tanks due to the fire. In the event of fire, cool
containers of Silicon Tetrachloride with water to prevent failure. Use a water spray or fog to reduce or direct vapors. Do not
direct a water spray at the source of a release. If Silicon Tetrachloride is involved in a fire, fire run-off water should be
contained to prevent possible environmental damage.
6. ACCIDENTAL RELEASE MEASURES
SPILL AND LEAK RESPONSE: Uncontrolled releases should be responded to by trained personnel using pre-planned
procedures. Proper protective equipment should be used. In case of a large spill, clear the affected area, protect.
Minimum Personal Protective Equipment should be Level B: triple-gloves (rubber gloves and nitrile gloves, over latex
gloves), chemically resistant suit and boots, hard-hat, and Self Contained Breathing Apparatus.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 3 OF 9
6. ACCIDENTAL RELEASE MEASURES (Continued)
Releases of Silicon Tetrachloride will be evident by the cloud of hydrochloric acid mist which is formed. Monitor the
surrounding area for oxygen and Hydrogen Chloride (the decomposition product of Silicon Tetrachloride) levels. The
Hydrogen Chloride level must be below the exposure limits provided in Section 2 (Composition and Information on
Ingredients) and the atmosphere must have at least 19.5 percent oxygen before personnel can be allowed in the area
without Self-Contained Breathing Apparatus.
Absorb spilled liquid with polypads or other suitable absorbent materials. Neutralize residue with sodium bicarbonate or
other neutralizing agent for acids. Decontaminate the area thoroughly. Test area with litmus paper to ensure
neutralization. Place all spill residue in a suitable container. Do not store spill residue in glass containers. Dispose of in
accordance with applicable U.S. Federal, State, or local procedures, or appropriate Canadian standards (see Section 13,
Disposal Considerations).
PART III How can I prevent hazardous situations from occurring?
7. HANDLING and STORAGE
WORK PRACTICES AND HYGIENE PRACTICES: As with all chemicals, avoid getting Silicon Tetrachloride IN YOU. Do
not eat or drink while handling chemicals. Be aware of any signs of effects of Silicon Tetrachloride exposure indicated in
Section 3 (Hazard Identification); exposures to fatal concentrations of Silicon Tetrachloride could occur rapidly.
STORAGE AND HANDLING PRACTICES: All employees who handle this material should be trained to handle it safely.
Avoid breathing vapors or mists generated by Silicon Tetrachloride. Use in a well-ventilated location. Cylinders of Silicon
Tetrachloride must be properly labeled. If Silicon Tetrachloride is used in other types of containers, only use portable
containers and dispensing equipment (faucet, pump, drip can) approved for corrosive liquids.
Store cylinders of Silicon Tetrachloride in a cool, dry location, away from direct sunlight, sources of intense heat, or where
freezing is possible. Do not allow area where cylinders are stored to exceed 52掳C (125掳F). Material should be stored in
secondary containers, or in a diked area, as appropriate. Store containers away from incompatible chemicals. Keep
container tightly closed when not in use. Storage areas should be made of fire-resistant materials. Inspect all incoming
containers before storage, to ensure containers are properly labeled and not damaged.
Empty containers may contain residual corrosive liquid or vapors. Therefore, empty containers should be handled with
care.
SPECIAL PRECAUTIONS FOR HANDLING CYLINDERS: Protect cylinders of Silicon Tetrachloride against physical
damage. If appropriate, cylinders should be stored in an up-right position. Cylinders should be firmly secured to prevent
falling or being knocked over. Cylinders can be stored in the open, but in such cases, should be protected against
extremes of weather and from the dampness of the ground to prevent rusting. Never tamper with pressure relief devices in
valves and cylinders. The following rules are applicable to situations in which cylinders are being used:
Before Use: If appropriate, move cylinders with a suitable hand-truck. Do not drag, slide or roll cylinders. Do not drop
cylinders or permit them to strike each other. Secure cylinders firmly. Leave the valve protection cap in-place until cylinder
is ready for use.
During Use: Use designated CGA fittings and other support equipment. Do not use adapters. Do not heat cylinder by
any means to increase the discharge rate of the product from the cylinder. Use check valve or trap in discharge line to
prevent hazardous backflow into the cylinder. Do not use oils or grease on gas-handling fittings or equipment.
After Use: Close main cylinder valve. Replace valve protection cap. Mark empty cylinders 鈥淓MPTY鈥?.
NOTE: Use only DOT or ASME code containers. Earth-ground and bond all lines and equipment associated with Silicon
Tetrachloride. Close valve after each use and when empty. Cylinders must not be recharged except by or with the consent
of owner. For additional information refer to the Compressed Gas Association Bulletin SB-2 鈥淥xygen Deficient
Atmospheres鈥?.
PROTECTIVE PRACTICES DURING MAINTENANCE OF CONTAMINATED EQUIPMENT: Follow practices indicated in
Section 6 (Accidental Release Measures). Make certain application equipment is locked and tagged-out safely. Always
use Silicon Tetrachloride in areas where adequate ventilation is provided. Decontaminate equipment using soapy water
before maintenance begins. Collect all rinsates and dispose of according to applicable Federal, State, or local procedures.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 4 OF 9
8. EXPOSURE CONTROLS - PERSONAL PROTECTION
VENTILATION AND ENGINEERING CONTROLS: Use with adequate ventilation. Local exhaust ventilation is preferred,
because it prevents Silicon Tetrachloride dispersion into the work place by eliminating it at its source. A hood with forced
ventilation is preferable. Ductwork should be constructed of non-metallic material, or should be lined to resist corrosion.
RESPIRATORY PROTECTION: Maintain oxygen levels above 19.5% in the workplace. Use supplied air respiratory
protection if oxygen levels are below 19.5% or during emergency response to a release of Silicon Tetrachloride. If
respiratory protection is required, follow the requirements of the Federal OSHA Respiratory Protection Standard (29 CFR
1910.134), or equivalent U.S. State standards, or the applicable regulations of Canada and its Provinces. The following
NIOSH respiratory protection recommendations are for Hydrogen Chloride (a decomposition product of Silicon
Tetrachloride).
CONCENTRATION RESPIRATORY EQUIPMENT
UP TO 50 ppm: Chemical cartridge respirator with cartridge(s) to protect against hydrogen chloride; or gas
mask with canister to protect against hydrogen chloride; or powered air-purifying respirator
with cartridge(s) to protect against hydrogen chloride; or SAR; or full-facepiece SCBA.
EMERGENCY OR PLANNED ENTRY INTO UNKNOWN CONCENTRATION OR IDLH CONDITIONS: Positive
pressure, full-facepiece SCBA; or positive pressure, full-facepiece SAR with an auxiliary
positive pressure SCBA.
ESCAPE: Gas mask with acid gas canister; or escape-type SCBA.
NOTE: The IDLH concentration for hydrogen chloride is 50 ppm.
EYE PROTECTION: Splash goggles or safety glasses and face shield.
HAND PROTECTION: Wear Neoprene Rubber gloves for industrial use. Use triple gloves for spill response (see Section
6, Accidental Release Measures).
BODY PROTECTION: Use body protection appropriate for task. An apron, or other impermeable body protection is
suggested. Full-body chemical protective clothing is recommended for emergency response procedures.
9. PHYSICAL and CHEMICAL PROPERTIES
VAPOR DENSITY (air = 1): 5.88 pH: < 2
SPECIFIC GRAVITY (water = 1): 1.52 FREEZING POINT: -70掳C (-94掳F)
SOLUBILITY IN WATER: Generates hydrochloric acid. BOILING POINT @ 1 atm.: 59掳C (138掳F)
EVAPORATION RATE (nBuAc = 1): Not applicable. EXPANSION RATIO: Not applicable
ODOR THRESHOLD: 1-5 ppm (Hydrogen Chloride) VAPOR PRESSURE (mm Hg): 194
SPECIFIC VOLUME (ft3/lb): Not applicable.
COEFFICIENT WATER/OIL DISTRIBUTION: Not applicable.
APPEARANCE AND COLOR: Silicon Tetrachloride is a pungent-smelling, colorless to light-yellow liquid having a
suffocating odor. This substance fumes strongly in moist air, producing a cloud of hydrochloric acid mist.
HOW TO DETECT THIS SUBSTANCE (warning properties): The odor and dense, white appearance of the hydrochloric
acid mist generated from this product are distinctive warning properties associated with releases of Silicon Tetrachloride.
The presence of acidic solutions of this product can be detected by using litmus paper, which will turn red when in contact
with acidic solutions.
10. STABILITY and REACTIVITY
STABILITY: Relative stable, but Silicon Tetrachloride will react readily in moist air to form hydrochloric acid mist.
CONDITIONS TO AVOID: Silicon Tetrachloride decomposes, but reacts with water to form hydrochloric acid. The
substance will also generate silicon compounds.
MATERIALS WITH WHICH SUBSTANCE IS INCOMPATIBLE: Silicon Tetrachloride is not compatible with water, moist
air, strong acids, strong bases, alcohols, metals, alkali metals, glass.
HAZARDOUS POLYMERIZATION: Will not occur.
CONDITIONS TO AVOID: Extreme heat and contact with water and incompatible chemicals. Cylinders exposed to high
temperatures or direct flame can rupture or burst.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 5 OF 9
PART IV Is there any other useful information about this material?
11. TOXICOLOGICAL INFORMATION
TOXICITY DATA: The following information is for Silicon Tetrachloride.
Standard Draize test; skin; rabbit: 500 mg/24 hours: Severe
Standard Draize test; eye; rabbit: 20 mg/24 hours: Moderate
LC50 - Inhalation - rat: 8000 ppm/4 hours
LCLo - Inhalation - mouse: 15 gm/m3
The following information is for Hydrogen Chloride and Hydrochloric Acid Mists (the decomposition products of this
substance):
HYDROGEN CHLORIDE: HYDROGEN CHLORIDE (Continued):
Eye Irritation (rabbit) 100 mg, mild reaction LDLo (human) 81 mg/kg
DNA Repair System (E. coli) 0.025 mg/well LC50 (Inhalation-rat) 3124 ppm/1 hour
Cytogenetic Analysis System (Grasshopper, via skin) 20 mg LC50 (Inhalation-mouse) 1108 ppm/1 hour
3
TCLo (Inhalation - rat) 450 mg/m Teratogenic effects LD50 (Intraperitoneal-mouse) 1449 mg/kg
LCLo (Inhalation-human) 1300 ppm/30 minutes LD50 (Oral-rabbit) 900 mg/kg
LCLo (Inhalation-human) 3000 ppm/5 minutes LCLo (Inhalation-rabbit) 4416 ppm/30 minutes
HYDROCHLORIC ACID MIST:
LD50 (oral-rabbit) = 900 mg/kg.
LC50 (inhalation-rat) = 4701 ppm for 30 minutes; 5666 ppm for 30 minutes.
LC50 (inhalation-mouse) = 2644 ppm for 30 minutes; 2142 ppm for 30 minutes.
SUSPECTED CANCER AGENT: Silicon Tetrachloride is not found on the following lists: FEDERAL OSHA Z LIST, NTP,
CAL/OSHA, and therefore is not considered to be, nor suspected to be a cancer-causing agent by these agencies. IARC
lists Hydrogen Chloride (a decomposition product of this substance) as 鈥淣ot Classifiable as to Carcinogenicity in Humans鈥?
(IARC 3).
IRRITANCY OF PRODUCT: Silicon Tetrachloride is severely irritating and corrosive to contaminated tissue.
SENSITIZATION OF PRODUCT: Silicon Tetrachloride is not a known sensitizer upon prolonged or repeated exposure.
REPRODUCTIVE TOXICITY INFORMATION: Listed below is information concerning the effects of Silicon Tetrachloride
on the human reproductive system.
Mutagenicity: No human mutation effects have been described for Silicon Tetrachloride.
Embryotoxcity: No human embryotoxic effects have been described for Silicon Tetrachloride.
Teratogenicity: No human teratogenic effects have been described for Silicon Tetrachloride.
Reproductive Toxicity: No human reproductive effects have been described for Silicon Tetrachloride.
A mutagen is a chemical which causes permanent changes to genetic material (DNA) such that the changes will propagate
through generation lines. An embryotoxin is a chemical which causes damage to a developing embryo (i.e. within the first
eight weeks of pregnancy in humans), but the damage does not propagate across generational lines. A teratogen is a
chemical which causes damage to a developing fetus, but the damage does not propagate across generational lines. A
reproductive toxin is any substance which interferes in any way with the reproductive process.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: Pre-existing dermatitis, respiratory conditions, and involving the
Target Organs (see Section 3, Hazard Identification) may be aggravated by overexposure to Silicon Tetrachloride.
RECOMMENDATIONS TO PHYSICIANS: Treat symptoms and eliminate overexposure. Treat symptoms and eliminate
overexposure. Provide oxygen, if necessary. Pulmonary function tests, chest X-rays, and nervous system evaluations may
prove useful. Consultation with an ophthalmologist is recommended if eye exposure leads to tissue damage.
ACGIH BIOLOGICAL EXPOSURE INDICES (BEIs): Currently, ACGIH Biological Exposure Indices are not applicable to
Silicon Tetrachloride.
12. ECOLOGICAL INFORMATION
ENVIRONMENTAL STABILITY: Silicon Tetrachloride is relatively stable, but will decompose when in contact with water or
moist air; hydrochloric acid will be generated. All work practices should be aimed at eliminating environmental
contamination.
EFFECT OF MATERIAL ON PLANTS or ANIMALS: Due to the corrosive nature of Silicon Tetrachloride, animals exposed
to this product will experience tissue damage, burns, and may be killed. Plants contaminated with Silicon Tetrachloride
may be adversely affected or destroyed.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 6 OF 9
12. ECOLOGICAL INFORMATION (Continued)
EFFECT OF CHEMICAL ON AQUATIC LIFE: Silicon Tetrachloride will decompose in water to from Hydrogen Chloride.
Hydrogen Chloride is very soluble in water, and even low concentrations of Hydrogen Chloride in water is detrimental to
aquatic life. If a release of Silicon Tetrachloride occurs near a river or other body of water, the release has the potential to
kill fish and other aquatic life. There are no specific aquatic toxicity data for Silicon Tetrachloride; the following aquatic
toxicity data are available for Hydrogen Chloride:
HYDROGEN CHLORIDE:
282 ppm/96 hr/mosquito fish/TLm/fresh water
100-330 ppm/48/hour/shrimp/LC50/salt water.
13. DISPOSAL CONSIDERATIONS
PREPARING WASTES FOR DISPOSAL: Waste disposal must be in accordance with appropriate U.S. Federal, State, and
local regulations or with regulations of Canada and its Provinces. Return cylinders with residual product to Airgas, Inc. Do
not dispose of locally.
14. TRANSPORTATION INFORMATION
THIS MATERIAL IS HAZARDOUS AS DEFINED BY 49 CFR 172.101 BY THE U.S. DEPARTMENT OF
TRANSPORTATION.
PROPER SHIPPING NAME: Silicon tetrachloride
HAZARD CLASS NUMBER and DESCRIPTION: 8 (Corrosive Material)
UN IDENTIFICATION NUMBER: UN 1818
PACKING GROUP: PG II
DOT LABEL(S) REQUIRED: Corrosive
NORTH AMERICAN EMERGENCY RESPONSE GUIDEBOOK NUMBER (1996): 156
MARINE POLLUTANT: Silicon Tetrachloride is not designated by the Department of Transportation to be a Marine
Pollutant (49 CFR 172.101, Appendix B).
TRANSPORT CANADA TRANSPORTATION OF DANGEROUS GOODS REGULATIONS: THIS MATERIAL IS
CONSIDERED AS DANGEROUS GOODS. Refer to the above information for Canadian Shipments.
15. REGULATORY INFORMATION
ADDITIONAL U.S. REGULATIONS:
U.S. SARA REPORTING REQUIREMENTS: Silicon Tetrachloride is not subject to the reporting requirements of Sections
302, 304, and 313 of Title III of the Superfund Amendments and Reauthorization Act.
U.S. SARA THRESHOLD PLANNING QUANTITY: Not applicable.
U.S. CERCLA REPORTABLE QUANTITY (RQ): Not applicable.
U.S. TSCA INVENTORY STATUS: Silicon Tetrachloride is listed on the TSCA Inventory.
OTHER U.S. FEDERAL REGULATIONS: Not applicable.
U.S. STATE REGULATORY INFORMATION: Silicon Tetrachloride is covered under specific State regulations, as denoted
below:
Alaska - Designated Toxic and Hazardous Michigan - Critical Materials Register: No. Pennsylvania - Hazardous Substance List:
No.
Substances: No. Minnesota - List of Hazardous Substances:
No. Rhode Island - Hazardous Substance List:
California - Permissible Exposure Limits
No.
Missouri - Employer Information/Toxic
for Chemical Contaminants: No.
Texas - Hazardous Substance List: No.
Substance List: No.
Florida - Substance List: No.
West Virginia - Hazardous Substance List:
New Jersey - Right to Know Hazardous
Illinois - Toxic Substance List: No.
No.
Substance List: Silicon Tetrachloride.
Kansas - Section 302/313 List: No.
Wisconsin - Toxic and Hazardous
North Dakota - List of Hazardous
Massachusetts - Substance List: No.
Substances: No.
Chemicals, Reportable Quantities: No.
CALIFORNIA SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT (PROPOSITION 65): Silicon Tetrachloride is
not on the California Proposition 65 lists.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 7 OF 9
15. REGULATORY INFORMATION (Continued)
ANSI LABELING (Z129.1): DANGER! CORROSIVE. WATER-REACTIVE. MAY BE FATAL IF SWALLOWED. CAUSES
SKIN AND EYE BURNS. HARMFUL OR FATAL IF INHALED. REACTS VIGOROUSLY WITH WATER TO GENERATE
ACIDIC GAS. Do not taste or swallow. Do not get on skin or in eyes. Avoid breathing vapors or mist. Keep container
closed. Use only with adequate ventilation. Wash thoroughly after handling. Wear gloves, goggles, faceshields, suitable
body protection, and NIOSH/MSHA-approved respiratory protection, as appropriate. Keep away from water or moisture.
Ensure all containers are moisture-free before use. FIRST-AID: In case of contact, immediately flush skin or eyes with
plenty of water for at least 15 minutes while removing contaminated clothing and shoes. If inhaled, remove to fresh air. If
ingested, do not induce vomiting. Get medical attention. IN CASE OF FIRE: Use water fog, dry chemical, CO2, or
鈥渁lcohol鈥? foam. IN CASE OF SPILL: Absorb spill with inert material or neutralizing agent for acids. Place residue in
suitable container. Consult Material Safety Data Sheet for additional information.
ADDITIONAL CANADIAN REGULATIONS:
CANADIAN DSL/NDSL INVENTORY STATUS: Silicon Tetrachloride is listed on the DSL/NDSL Inventory.
CANADIAN ENVIRONMENTAL PROTECTION ACT (CEPA) PRIORITIES SUBSTANCES LISTS: Silicon Tetrachloride is
not on the CEPA Priorities Substances Lists, as follows
OTHER CANADIAN REGULATIONS: Not applicable.
CANADIAN WHMIS SYMBOLS: Class E: Corrosive Material
Class F: Dangerously Reactive Material
16. OTHER INFORMATION
PREPARED BY: CHEMICAL SAFETY ASSOCIATES, Inc.
9163 Chesapeake Drive, San Diego, CA 92123-1002
619/565-0302
The information contained herein is based on data considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data or
the results to be obtained from the use thereof. AIRGAS, Inc. assumes no responsibility for injury to the vendee or third persons proximately caused by the
material if reasonable safety procedures are not adhered to as stipulated in the data sheet. Additionally, AIRGAS, Inc. assumes no responsibility for injury to
vendee or third persons proximately caused by abnormal use of the material even if reasonable safety procedures are followed. Furthermore, vendee assumes
the risk in his use of the material.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 8 OF 9
DEFINITIONS OF TERMS
A large number of abbreviations and acronyms appear on a MSDS. Some of these which are commonly used include the following:
CAS #: This is the Chemical Abstract Service Number which uniquely identifies each constituent. It is used for computer-related searching.
EXPOSURE LIMITS IN AIR: FLAMMABILITY LIMITS IN AIR:
Much of the information related to fire and explosion is derived from the
ACGIH - American Conference of Governmental Industrial Hygienists, a
National Fire Protection Association (NFPA). Flash Point - Minimum
professional association which establishes exposure limits. TLV -
temperature at which a liquid gives off sufficient vapors to form an ignitable
Threshold Limit Value - an airborne concentration of a substance which
mixture with air. Autoignition Temperature: The minimum temperature
represents conditions under which it is generally believed that nearly all
required to initiate combustion in air with no other source of ignition. LEL -
workers may be repeatedly exposed without adverse effect. The duration
the lowest percent of vapor in air, by volume, that will explode or ignite in
must be considered, including the 8-hour Time Weighted Average (TWA),
the presence of an ignition source. UEL - the highest percent of vapor in air,
the 15-minute Short Term Exposure Limit, and the instantaneous Ceiling
by volume, that will explode or ignite in the presence of an ignition source.
Level (C). Skin absorption effects must also be considered.
OSHA - U.S. Occupational Safety and Health Administration.
TOXICOLOGICAL INFORMATION:
PEL - Permissible Exposure Limit - This exposure value means exactly the
Human and Animal Toxicology: Possible health hazards as derived from
same as a TLV, except that it is enforceable by OSHA. The OSHA
human data, animal studies, or from the results of studies with similar
Permissible Exposure Limits are based in the 1989 PELs and the June,
compounds are presented. Definitions of some terms used in this section
1993 Air Contaminants Rule (Federal Register: 58: 35338-35351 and 58:
are: LD50 - Lethal Dose (solids & liquids) which kills 50% of the exposed
40191). Both the current PELs and the vacated PELs are indicated. The
animals; LC50 - Lethal Concentration (gases) which kills 50% of the
phrase, 鈥淰acated 1989 PEL,鈥? is placed next to the PEL which was vacated
exposed animals; ppm concentration expressed in parts of material per
by Court Order. IDLH - Immediately Dangerous to Life and Health - This
million parts of air or water; mg/m3 concentration expressed in weight of
level represents a concentration from which one can escape within 30-
substance per volume of air; mg/kg quantity of material, by weight,
minutes without suffering escape-preventing or permanent injury. The DFG
administered to a test subject, based on their body weight in kg. Other
- MAK is the Republic of Germany鈥檚 Maximum Exposure Level, similar to
measures of toxicity include TDLo, the lowest dose to cause a symptom
the U.S. PEL. NIOSH is the National Institute of Occupational Safety and
and TCLo the lowest concentration to cause a symptom; TDo, LDLo, and
Health, which is the research arm of the U.S. Occupational Safety and
LDo, or TC, TCo, LCLo, and LCo, the lowest dose (or concentration) to
Health Administration (OSHA). NIOSH issues exposure guidelines called
cause lethal or toxic effects. Cancer Information: The sources are: IARC
Recommended Exposure Levels (RELs). When no exposure guidelines
- the International Agency for Research on Cancer; NTP - the National
are established, an entry of NE is made for reference.
Toxicology Program, RTECS - the Registry of Toxic Effects of Chemical
HAZARD RATINGS: Substances, OSHA and CAL/OSHA. IARC and NTP rate chemicals on a
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM: Health Hazard: 0 scale of decreasing potential to cause human cancer with rankings from 1
(minimal acute or chronic exposure hazard); 1 (slight acute or chronic to 4. Subrankings (2A, 2B, etc.) are also used. Other Information: BEI -
ACGIH Biological Exposure Indices, represent the levels of determinants
exposure hazard); 2 (moderate acute or significant chronic exposure
which are most likely to be observed in specimens collected from a healthy
hazard); 3 (severe acute exposure hazard; onetime overexposure can result
worker who has been exposed to chemicals to the same extent as a worker
in permanent injury and may be fatal); 4 (extreme acute exposure hazard;
with inhalation exposure to the TLV. Ecological Information: EC is the
onetime overexposure can be fatal). Flammability Hazard: 0 (minimal
effect concentration in water. BCF = Bioconcentration Factor, which is used
hazard); 1 (materials that require substantial pre-heating before burning); 2
to determine if a substance will concentrate in lifeforms which consume
(combustible liquid or solids; liquids with a flash point of 38-93掳C [100-
contaminated plant or animal matter. Tlm = median threshold limit;
200掳F]); 3 (Class IB and IC flammable liquids with flash points below 38掳C
Coefficient of Oil/Water Distribution is represented by log Kow or log Koc
[100掳F]); 4 (Class IA flammable liquids with flash points below 23掳C [73掳F]
and is used to assess a substance鈥檚 behavior in the environment.
and boiling points below 38掳C [100掳F]. Reactivity Hazard: 0 (normally
REGULATORY INFORMATION:
stable); 1 (material that can become unstable at elevated temperatures or
This section explains the impact of various laws and regulations on the
which can react slightly with water); 2 (materials that are unstable but do not
material. U.S.: EPA is the U.S. Environmental Protection Agency. DOT is
detonate or which can react violently with water); 3 (materials that can
the U.S. Department of Transportation. SARA is the Superfund
detonate when initiated or which can react explosively with water); 4
Amendments and Reauthorization Act. TSCA is the U.S. Toxic Substance
(materials that can detonate at normal temperatures or pressures).
Control Act. CERCLA (or Superfund) refers to the Comprehensive
NATIONAL FIRE PROTECTION ASSOCIATION: Health Hazard: 0
Environmental Response, Compensation, and Liability Act. Labeling is per
(material that on exposure under fire conditions would offer no hazard
the American National Standards Institute (ANSI Z129.1). CANADA:
beyond that of ordinary combustible materials); 1 (materials that on
CEPA is the Canadian Environmental Protection Act. WHMIS is the
exposure under fire conditions could cause irritation or minor residual
Canadian Workplace Hazardous Materials Information System. TC is
injury); 2 (materials that on intense or continued exposure under fire
Transport Canada. DSL/NDSL are the Canadian Domestic/Non-Domestic
conditions could cause temporary incapacitation or possible residual injury);
Substances Lists.
3 (materials that can on short exposure could cause serious temporary or
residual injury); 4 (materials that under very short exposure causes death
or major residual injury). Flammability Hazard and Reactivity Hazard: Refer
to definitions for 鈥淗azardous Materials Identification System鈥?.
SILICON TETRACHLORIDE - SiCl4 MSDS (DOCUMENT # 001075) PAGE 9 OF 9
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