**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****
+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 7778-50-9 |Chromic acid, dipotassium salt | 99.5 | 231-906-6 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: T+ N
Risk Phrases: 21 25 26 37/38 41 43 46 49 50/53
**** SECTION 3 - HAZARDS IDENTIFICATION ****
EMERGENCY OVERVIEW
Harmful in contact with skin. Toxic if swallowed. Very toxic by
inhalation. Irritating to respiratory system and skin. Risk of
serious damage to eyes. May cause sensitization by skin contact. May
cause heritable genetic damage. May cause cancer by inhalation. Very
toxic to aquatic organisms, may cause long-term adverse effects in
the aquatic environment.Dangerous for the environment.
Potential Health Effects
Eye:
Causes eye burns. May cause chemical conjunctivitis and corneal
damage.
Skin:
May be fatal if absorbed through the skin. Causes skin burns. May
cause skin sensitization, an allergic reaction, which becomes
evident upon re-exposure to this material. Chrome ulcers,
penetrating lesions of the skin, occur chiefly on the hand and
forearm where there has been a break in the epidermis.
Ingestion:
May be fatal if swallowed. May cause severe and permanent damage to
the digestive tract. Causes gastrointestinal tract burns. May cause
perforation of the digestive tract. May cause methemoglobinemia,
cyanosis (bluish discoloration of skin due to deficient oxygenation
of the blood), convulsions, and death. Methemoglobinemia is
characterized by dizziness, drowsiness, headache, shortness of
breath, cyanosis (bluish discoloration of skin due to deficient
oxygenation of the blood), rapid heart rate and chocolate-brown
colored blood.
Inhalation:
May cause asthmatic attacks due to allergic sensitization of the
respiratory tract. May cause ulceration and perforation of the nasal
septum if inhaled in excessive quantities. Causes chemical burns to
the respiratory tract. Aspiration may lead to pulmonary edema.
Chronic:
Prolonged or repeated skin contact may cause sensitization
dermatitis and possible destruction and/or ulceration. May cause
respiratory tract cancer. May cause liver and kidney damage. Chronic
inhalation may cause nasal septum ulceration and perforation. May
cause reproductive and fetal effects. Effects may be delayed.
Laboratory experiments have resulted in mutagenic effects. Repeated
or prolonged exposure may cause erosion and discoloration of the
teeth.
**** SECTION 4 - FIRST AID MEASURES ****
Eyes:
Get medical aid immediately. Do NOT allow victim to rub eyes or keep
eyes closed. Extensive irrigation with water is required (at least 30
minutes).
Skin:
Get medical aid immediately. Immediately flush skin with plenty of
water for at least 15 minutes while removing contaminated clothing
and shoes. Wash clothing before reuse. Destroy contaminated shoes.
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:
Consider the use of calcium gluconate for muscle spasms and gastric
lavage followed by saline catharsis if soluble barium salts are
ingested. For methemoglobinemia, administer oxygen alone or with
Methylene Blue depending on the methemoglobin concentration in the
blood. Effects may be delayed.
**** 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. Strong oxidizer. Contact with
other material may cause fire. During a fire, irritating and highly
toxic gases may be generated by thermal decomposition or combustion.
Use water spray to keep fire-exposed containers cool. Use water with
caution and in flooding amounts. Containers may explode if exposed to
fire.
Extinguishing Media:
Use water only! Do NOT use dry chemical. Do NOT use halocarbons and
sodium bicarbonate. Do NOT use carbon dioxide or dry chemical.
Contact professional fire-fighters immediately. Cool containers with
flooding quantities of water until well after fire is out.
**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****
General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal
container. Avoid runoff into storm sewers and ditches which lead to
waterways. Clean up spills immediately, observing precautions in the
Protective Equipment section. Avoid generating dusty conditions.
Remove all sources of ignition. Provide ventilation. Do not use
combustible materials such as paper towels to clean up spill.
**** SECTION 7 - HANDLING and STORAGE ****
Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Minimize dust generation and accumulation. Do not
get in eyes, on skin, or on clothing. Keep container tightly closed.
Keep away from heat, sparks and flame. Avoid contact with clothing
and other combustible materials. Do not ingest or inhale. Use only
in a chemical fume hood. Discard contaminated shoes.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of
ignition. Do not store near combustible materials. Store in a
tightly closed container. Store in a cool, dry, well-ventilated area
away from incompatible substances. Keep away from reducing agents.
**** 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.
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 a respirator's use.
**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****
Physical State: Crystalline powder
Color: orange
Odor: odorless
pH: 4.0 (1.0% solution)
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 500 deg C (dec)
Freezing/Melting Point: 398 deg C
Autoignition Temperature: Not applicable.
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: 500 deg C
Solubility in water: Soluble.
Specific Gravity/Density: 2.676
Molecular Formula: K2Cr2O7
Molecular Weight: 294.1844
**** SECTION 10 - STABILITY AND REACTIVITY ****
Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, ignition sources, dust generation, excess
heat, combustible materials, reducing agents, flammable materials.
Incompatibilities with Other Materials:
Reducing agents, acids, organic matter, hydrazine, sulfuric acid +
acetone, hydroxylamine, ethylene glycol, boron, silicon, iron,
tungsten, sulfur, aluminum, plastics.
Hazardous Decomposition Products:
Irritating and toxic fumes and gases, oxides of potassium, chromium
dioxide, potassium.
Hazardous Polymerization: Has not been reported.
**** SECTION 11 - TOXICOLOGICAL INFORMATION ****
RTECS#:
CAS# 7778-50-9: HX7680000
LD50/LC50:
CAS# 7778-50-9: Draize test, rabbit, eye: 140 mg Severe; Oral,
mouse: LD50 = 190 mg/kg; Oral, rat: LD50 = 25 mg/kg; Skin, rabbit:
LD50 = 14 mg/kg.
Oral, rat: LD50 = 25 mg/kg.
Carcinogenicity:
Chromic acid, dipotassium salt -
California: carcinogen, initial date 2/27/87 (listed as Chromium (VI)
NTP: Known carcinogen (listed as Chromium (VI) compounds).
IARC: Group 1 carcinogen (listed as Chromium (VI) compounds).
Other:
See actual entry in RTECS for complete information.
**** SECTION 12 - ECOLOGICAL INFORMATION ****
Ecotoxicity:
Fish: Striped bass: LC50 = 75 mg/L; 96 Hr; Static bioassayFish:
Fathead Minnow: LC50 = 17,300 ug/L; Unspecified; as chromium
(Unspecified)Fish: Bluegill/Sunfish: LC50 = 118,000-133,000 ug/L;
Unspecified; as chromium (Static unmeasured)Water flea Daphnia: EC50
=1,570 ug/L; 24 Hr; as chromium (Unspecified)Chromium probably occurs
as the insoluble Cr(III) oxide (Cr2O3.nH2O) in
soil, as the organic
matter in soil is expected to reduce any soluble chromate to
insoluble chromic oxide (Cr2O3). Chromium in soil can be transported
to the atmosphere by way of aerosol formation. Chromium is also
transported from soil through runoff and leaching of water.
Other
Dangerous to aquatic life in high concentrations.
**** SECTION 13 - DISPOSAL CONSIDERATIONS ****
Dispose of in a manner consistent with federal, state, and local regulations.
**** SECTION 14 - TRANSPORT INFORMATION ****
IATA
Shipping Name: OXIDIZING SOLID, N.O.S.*
Hazard Class: 5.1
UN Number: 1479
Packing Group: III
IMO
Shipping Name: OXIDIZING SOLID, N.O.S.
Hazard Class: 5.1
UN Number: 1479
Packing Group: III
RID/ADR
Shipping Name: OXIDIZING SOLID, N.O.S.
Hazard Class: 5.1
UN Number: 1479
Packing group: III
USA RQ:CAS# 7778-50-9: 10 lb final RQ; 4.54 kg final RQ
**** SECTION 15 - REGULATORY INFORMATION ****
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ N
Risk Phrases:
R 46 May cause heritable genetic damage.
R 49 May cause cancer by inhalation.
R 21 Harmful in contact with skin.
R 25 Toxic if swallowed.
R 26 Very toxic by inhalation.
R 37/38 Irritating to respiratory system and skin.
R 41 Risk of serious damage to eyes.
R 43 May cause sensitization by skin contact.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 53 Avoid exposure - obtain special instructions
before use.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 7778-50-9: 3
United Kingdom Occupational Exposure Limits
United Kingdom Maximum Exposure Limits
CAS# 7778-50-9: MEL-United Kingdom, TWA (listed as ** undefined
**): 0.05 mg/m3 TWA (as Cr)
Canada
CAS# 7778-50-9 is listed on Canada's DSL List.
CAS# 7778-50-9 is listed on Canada's Ingredient Disclosure List.
Exposure Limits
CAS# 7778-50-9: Not available.
US FEDERAL
TSCA
CAS# 7778-50-9 is listed on the TSCA inventory.
**** SECTION 16 - ADDITIONAL INFORMATION ****
MSDS Creation Date: 7/19/1999 Revision #4 Date: 10/07/2003
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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