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MSDS 
:
 Methyl disulfide, 99%
CAS 
:
 624-92-0
SYNONYMS 
:
 Dimethyl disulfide; Dimethyldisulfide; Disulfide, dimethyl
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 624-92-0 |Methyl disulfide | 99.0 | 210-871-0 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: T+ F
Risk Phrases: 11 26

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Highly flammable. Very toxic by inhalation.Highly toxic.Stench.

Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May cause dermatitis.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. May cause liver damage. May be harmful if swallowed.
Inhalation:
May be fatal if inhaled. Vapors may cause dizziness or suffocation.
Causes upper respiratory tract irritation. Exposure may cause blood
abnormalities. Causes irritation of the mucous membrane.
Chronic:
Effects may be delayed. Exposure to high concentrations may cause
tearing, cyanosis (bluish discoloration of skin due to deficient
oxygenation of the blood), central nervous system depression or
hemorrhage in the lung. Prolonged or repeated exposure may cause
hemolytic anemia which can lead to renal failure.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
Immediately flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Immediately flush skin with plenty of water for at
least 15 minutes while removing contaminated clothing and shoes.
Wash clothing before reuse.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4
cupfuls of milk or water. Never give anything by mouth to an
unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh
air immediately. If breathing is difficult, give oxygen. Do NOT use
mouth-to-mouth resuscitation. If breathing has ceased apply
artificial respiration using oxygen and a suitable mechanical device
such as a bag and a mask.
Notes to Physician:
Treat symptomatically and supportively.

**** SECTION 5 - FIRE FIGHTING MEASURES ****

General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. Water runoff can cause environmental damage. Dike
and collect water used to fight fire. Vapors may form an explosive
mixture with air. Vapors can travel to a source of ignition and
flash back. Can burn in a fire, releasing toxic vapors. Will burn if
involved in a fire. Use water spray to keep fire-exposed containers
cool. Containers may explode in the heat of a fire. Flammable liquid
and vapor. Vapors may be heavier than air. They can spread along
the ground and collect in low or confined areas. May be ignited by
heat, sparks, and flame. Containers may explode when heated.
Extinguishing Media:
Water may be ineffective. Use agent most appropriate to extinguish
fire. Do NOT use straight streams of water. For large fires, use
water spray, fog or regular foam. For small fires, use dry chemical,
carbon dioxide, water spray or regular foam. Cool containers with
flooding quantities of water until well after fire is out. For large
fires flood fire with water from a distance.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth),
then place in suitable container. Use water spray to dilute spill to
a non-flammable mixture. Avoid runoff into storm sewers and ditches
which lead to waterways. Clean up spills immediately, observing
precautions in the Protective Equipment section. Remove all sources
of ignition. Absorb spill using an absorbent, non-combustible
material such as earth, sand, or vermiculite. Do not use combustible
materials such as sawdust. Use a spark-proof tool. Provide
ventilation. A vapor suppressing foam may be used to reduce vapors.
Water spray may reduce vapor but may not prevent ignition in closed
spaces.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Wash thoroughly after handling. Ground and bond containers when
transferring material. Use spark-proof tools and explosion proof
equipment. Avoid contact with eyes, skin, and clothing. Empty
containers retain product residue, (liquid and/or vapor), and can be
dangerous. Keep container tightly closed. Keep away from heat,
sparks and flame. Do not ingest or inhale. Use only in a chemical
fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind,
or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of
ignition. Store in a tightly closed container. Store in a cool, dry,
well-ventilated area away from incompatible substances.
Flammables-area. Keep containers tightly closed.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

Engineering Controls:
Use explosion-proof ventilation equipment. Facilities storing or
utilizing this material should be equipped with an eyewash facility
and a safety shower. Use only under a chemical fume hood.
Exposure Limits
CAS# 624-92-0:


Personal Protective Equipment

Eyes:
Wear appropriate protective eyeglasses or chemical
safety goggles as described by OSHA's eye and face
protection regulations in 29 CFR 1910.133 or European
Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin
exposure.
Clothing:
Wear appropriate protective clothing to prevent skin
exposure.
Respirators:
A respiratory protection program that meets OSHA's 29
CFR 1910.134 and ANSI Z88.2 requirements or European
Standard EN 149 must be followed whenever workplace
conditions warrant respirator use.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Liquid
Color: clear yellow - clear, colorless
Odor: stench
pH: Not available.
Vapor Pressure: 28.6 mm Hg @ 25 C
Viscosity: 0.620 cP 20 deg C
Boiling Point: 109 deg C @ 760.00mm Hg
Freezing/Melting Point: -85 deg C
Autoignition Temperature: Not applicable.
Flash Point: 15 deg C ( 59.00 deg F)
Explosion Limits, lower: 1.10 vol %
Explosion Limits, upper: 16.00 vol %
Decomposition Temperature:
Solubility in water: insoluble
Specific Gravity/Density: 1.0625g/cm3
Molecular Formula: C2H6S2
Molecular Weight: 94.19

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable under normal temperatures and pressures. Reacts vigorously
with oxidizing agents. Photochemically oxidized by ozone.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat, strong
oxidants.
Incompatibilities with Other Materials:
Oxidizing agents, may react with copper, rubber, and plastic.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and
gases, carbon dioxide, hydrogen sulfide.
Hazardous Polymerization: Has not been reported.

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:
CAS# 624-92-0: JO1927500
LD50/LC50:
CAS# 624-92-0: Draize test, rabbit, eye: 100 uL/24H; Inhalation,
mouse: LC50 = 12300 ug/m3/2H; Inhalation, rat: LC50 = 15850 ug/m3/2H.
Oral, rat: LD50 = 535
Carcinogenicity:
Methyl disulfide -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****

Ecotoxicity:
Estimated Koc values of 36-218 suggest moderate to high soil mobility
of solution-phase methyl disulfide. Volatilization and
photodegradation are expected to be major fate processes for methyl
disulfide in water. Aquatic hydrolysis, bioconcentration and
adsorption to sediment are not expected to be important fate
processes because of the lack of hydroyzable group and high water
solubility. Based upon a vapor pressure of 28.7 mm Hg at 25 deg C
methyl disulfide is expected to exist primary in the vapor phase in
the ambient atmosphere.

**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3
UN Number: 2381
Packing Group: II
IMO
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3.2
UN Number: 2381
Packing Group: II
RID/ADR
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3
UN Number: 2381
Packing group: II

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ F
Risk Phrases:
R 11 Highly flammable.
R 26 Very toxic by inhalation.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 33 Take precautionary measures against static
discharges.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 624-92-0: 2
Canada
CAS# 624-92-0 is listed on Canada's DSL List.
CAS# 624-92-0 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 624-92-0 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 3/04/1999 Revision #2 Date: 3/18/2003

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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