**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****
+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 62-56-6 |Thiourea | ca.100 | 200-543-5 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: XN N
Risk Phrases: 22 40 63 51/53
**** SECTION 3 - HAZARDS IDENTIFICATION ****
EMERGENCY OVERVIEW
Harmful if swallowed. Limited evidence of a carcinogenic effect.
Possible risk of harm to the unborn child. Toxic to aquatic
organisms, may cause long-term adverse effects in the aquatic
environment.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May cause skin sensitization, an allergic
reaction, which becomes evident upon re-exposure to this material.
Ingestion:
Harmful if swallowed. May cause severe irritation of the digestive
tract. May cause anemia, leukopenia (reduction in the number of white
blood cells in the blood), and thrombocytopenia. May cause bone
marrow depression.
Inhalation:
May cause respiratory tract irritation.
Chronic:
May cause cancer according to animal studies. May cause reproductive
and fetal effects. Prolonged or repeated exposure may cause thyroid
damage. Chronic exposure may cause liver damage. Laboratory
experiments have resulted in mutagenic effects. Thiourea has an
antithyroid effect and it is possible that fetal goiter might be
produced by sufficient maternal exposure to this agent. Thiourea was
teratogenic in rats exposed to a 0.2% solution as drinking water.
**** SECTION 4 - FIRST AID MEASURES ****
Eyes:
In case of contact, immediately flush eyes with plenty of water for
at least 15 minutes. Get medical aid.
Skin:
In case of contact, immediately flush skin with soap and plenty of
water. Remove contaminated clothing and shoes. Get medical aid if
symptoms occur. Wash clothing before reuse.
Ingestion:
If swallowed, do not induce vomiting unless directed to do so by
medical personnel. Never give anything by mouth to an unconscious
person. Get medical aid.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial
respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:
**** 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. During a fire, irritating and
highly toxic gases may be generated by thermal decomposition or
combustion. Dusts may be an explosion hazard if mixed with air at
critical proportions and in the presence of an ignition source.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or appropriate foam.
**** 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.
Provide ventilation.
**** SECTION 7 - HANDLING and STORAGE ****
Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Minimize dust generation and accumulation. Avoid
contact with eyes, skin, and clothing. Use only with adequate
ventilation. Avoid breathing dust.
Storage:
Keep container closed when not in use. Store in a tightly closed
container. Store in a cool, dry, well-ventilated area away from
incompatible substances.
**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****
Engineering Controls:
Facilities storing or utilizing this material should be equipped
with an eyewash facility and a safety shower. Use adequate
ventilation to keep airborne concentrations low.
Exposure Limits
CAS# 62-56-6:
Netherlands: 0.5 mg/m3 MAC
Russia: 0.3 mg/m3 TWA
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: Crystals
Color: white
Odor: odorless
pH: Not available.
Vapor Pressure: 2.5 mm Hg @ 25 deg C
Viscosity: Not available.
Boiling Point: Decomposes.
Freezing/Melting Point: 176-178 deg C
Autoignition Temperature: 440 deg C ( 824.00 deg F)
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: > 180 deg C
Solubility in water: Soluble.
Specific Gravity/Density: 1.405
Molecular Formula: CH4N2S
Molecular Weight: 76.12
**** SECTION 10 - STABILITY AND REACTIVITY ****
Chemical Stability:
Stable under normal temperatures and pressures. Polymerization may
occur upon heating.
Conditions to Avoid:
Mechanical shock, dust generation, excess heat.
Incompatibilities with Other Materials:
Oxidizing agents, strong acids, strong bases, acrolein, nitric acid,
hydrogen peroxide, acrylaldehyde.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.
Hazardous Polymerization: May occur.
**** SECTION 11 - TOXICOLOGICAL INFORMATION ****
RTECS#:
CAS# 62-56-6: YU2800000
LD50/LC50:
CAS# 62-56-6: Draize test, rabbit, eye: 14%; Oral, rat: LD50 = 125
mg/kg.
Carcinogenicity:
Thiourea -
California: carcinogen, initial date 1/1/88
NTP: Suspect carcinogen
Other:
See actual entry in RTECS for complete information.
**** SECTION 12 - ECOLOGICAL INFORMATION ****
Ecotoxicity:
Fish: Fathead Minnow: LC50 > 600 mg/L; 96 Hr; UnspecifiedBacteria:
Phytobacterium phosphoreum: EC50 = 3400 mg/L; 15 min; Microtox
testWater flea Daphnia: LC50 = 1.8 mg/L; Unspecified; UnspecifiedIf
released to water, thiourea will react with hydroxyl radicals in
sunlit natural waters with an estimated half-life of 171 days.
Hydrolysis, volatilization, adsorption to sediments, and
bioconcentration are not expected to be important aquatic fate
processes. Thiourea appears to be generally resistant to aquatic
biodegradation as demonstrated by various standard biodegradation
tests.
Other
Testicular toxicity of thiourea has been demonstrated in fish
exposed to concentrations of 300 ppm.
**** SECTION 13 - DISPOSAL CONSIDERATIONS ****
Dispose of in a manner consistent with federal, state, and local regulations.
**** SECTION 14 - TRANSPORT INFORMATION ****
IATA
Shipping Name: TOXIC SOLID, ORGANIC, N.O.S.*
Hazard Class: 6.1
UN Number: 2811
Packing Group: III
IMO
Shipping Name: TOXIC SOLID, ORGANIC, N.O.S.
Hazard Class: 6.1
UN Number: 2811
Packing Group: III
RID/ADR
Shipping Name: TOXIC SOLID, ORGANIC, N.O.S.
Hazard Class: 6.1
UN Number: 2811
Packing group: III
USA RQ: CAS# 62-56-6: 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: XN N
Risk Phrases:
R 22 Harmful if swallowed.
R 40 Limited evidence of a carcinogenic effect.
R 51/53 Toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
R 63 Possible risk of harm to the unborn child.
Safety Phrases:
S 36/37 Wear suitable protective clothing and
gloves.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 62-56-6: 2
Canada
CAS# 62-56-6 is listed on Canada's DSL List.
CAS# 62-56-6 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 62-56-6 is listed on the TSCA inventory.
**** SECTION 16 - ADDITIONAL INFORMATION ****
MSDS Creation Date: 6/08/1999 Revision #4 Date: 5/17/2002
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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