Material Safety Data Sheet
Science Stuff, Inc.
1104 Newport Ave
Austin, TX 78753
Phone (512) 837-6020
Chemtrec 800-424-9300
24 Hour Emergency Assistance
Section 1 Identification
Product Number:C2854 
Health:
Flammability
Reactivity
Hazard Rating:
LeastSlightModerateHighExtreme
01234
NA = Not Applicable NE = Not Established
Product Name:Thiourea  Reagent A.C.S., Crystal
Trade/Chemical Synonyms 
Formula:NH’CSNH’
RTECS:YU2800000 
C.A.SCAS# 62-56-6
Section 2 Component Mixture
Sara 313ComponentCAS Number%DimExposure Limits:
Thiourea  CAS# 62-56-6 100% W/W TXDS: orl-wmn TDLo: 1,660 mg/Kg/5W 
Section 3 Hazard Identification (Also see section 11)
May be fatal if inhaled, swallowed or absorbed thru the skin Avoid all contact. Use with adequate ventilation. Wash thoroughly after use. Keep container closed. 
Section 4 First Aid Measures
May be fatal if inhaled, swallowed or absorbed thru the skin Avoid all contact. Use with adequate ventilation. Wash thoroughly after use. Keep container closed.

FIRST AID: SKIN: Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention

EYES: Wash eyes with plenty of water for at least 15 minutes, lifting lids occasionally. Seek Medical Aid. INHALATION: Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen

INGESTION: If swallowed, induce vomiting immediately after giving two glasses of water. Never give anything by mouth to an unconscious person.
Section 5 Fire Fighting Measures
Fire Extinguisher Type:Any means suitable for extinguishing surrounding fire
Fire/Explosion Hazards:decomposes at melting point. Dust may form explosive mixture with air.
Fire Fighting Procedure:Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and clothing.
Section 6 Accidental Release Measures
Evacuate area. Wear self-contained breathing apparatus and protective clothing. Eliminate all sources of ignition.
Section 7 Handling and Storage
Store in a cool, dry, well-ventilated place away from incompatible materials. Wash thoroughly after handling. 
Section 8 Exposure Controls & Personal Protection
Respiratory Protection:NIOSH approved dust mask
Ventilation: Mechanical: Hand Protection:Wear appropriate gloves to prevent skin exposure
Local Exhaust: Eye Protection:Splash Goggles
Other Protective Equipment: Wear appropriate clothing to prevent skin exposure
Section 9 Physical and Chemical Properties
Melting Point:177°cSpecific Gravity1.41
Boiling Point:not applicable Percent Volatile by Volume:0
Vapor Pressure:not applicable Evaporation Rate:not applicaable
Vapor Density: 2.6 Evaporation Standard: Not Applicable
Solubility in Water: moderate (1-10%) Auto ignition Temperature: Not applicable
Appearance and Odor: odorless white crystalline Lower Flamm. Limit in Air: Not applicable
Flash Point: not applicable Upper Flamm. Limit in Air: Not applicable
Section 10 Stability and Reactivity Information
Stability: StableConditions to Avoid: heat and dust
Materials to Avoid:
strong oxidizing agents, acrolein,nitric acid,hydrogen peroxide
Hazardous Decomposition Products:
ammonia,CO,CO2,oxides of sulfur,oxides of nitrogen
Hazardous Polymerization:Will Not Occur
Condition to Avoid:None known
Section 11 Additional Information
DANGER!! Dust of this material may form an explosive mixture with air. Effects of over exposure:irratition of the eyes,skin and upper resppiratory tract,eczema ,inhibit blood coagulation. Acute: toxic if inhaled swallowed or absorbed through the skin. Chronic: damage to the blood,liver and thyroid glands. Target organs: eyes,skin,upper respiratory tract,liver,blood and thyroid glands. Conditions aggravated/target organs. Persons with pre-existing eye,skin,respiratory and thyroid conditions may be more susceptible. 
DOT Classification: Toxic Solid, Organic, n.o.s. (Thiourea), 6.1, UN2811, PG III
DOT regulations may change from time to time. Please consult the most recent version of the relevant regulations.
Revision No:0Date Entered: 9/1/2006 Approved by: WPF

The information contained herein is believed to be accurate and is offered in good faith for the user's consideration and investigation. No warranty is expressed or implied regarding the completeness or accuracy of this information, whether originating from Science Stuff, Inc. or from an alternate source. Users of this material should satisfy themselves by independent investigation of current scientific and medical information that this material may be safely handled.