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thiourea
CAS No.: 62-56-6
Synonyms:
Formula: CH4N2S
Exact Mass: 76.00950
Molecular Weight: 76.12090
PSA: 84.13000
LogP: 0.58930
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thiourea 62-56-6 MSDS
Name: Thiourea P.A. Material Safety Data Sheet
Synonym: Thiocarbamide; Thiourea; Isothiourea; Thiocarbonic acid diamide; Sulourea
CAS: 62-56-6
Section 1 - Chemical Product   MSDS Name:Thiourea P.A. Material Safety Data Sheet
Synonym:Thiocarbamide; Thiourea; Isothiourea; Thiocarbonic acid diamide; Sulourea

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content 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
N/A

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