GFS CHEMICALS, INC.

                                    P.O. Box 245 Powell, OH 43065

                                 740-881-5501(Tel.) 740-881-5989(Fax)

                                 1-800-424-9300(Chemtrec 24Hr. Info.)



                               MATERIAL SAFETY DATA SHEET

                                                                                                    3676

                                   AMMONIUM TETRATHIOTUNGSTATE



CHEMICAL NAME & SYNONYMS                                                DOT CLASS     SARA TITLE 313

Ammonium Tetrathiotungstate                                             9/III         No

                                                                        TSCA listed - No



FORMULA                             REPORTABLE QUANTITY                 F.W.          CAS#

(NH 4) 2WS 4                                N/A                         348.18        13862-78-7



PHYSICAL DATA

Insoluble in water. Specific gravity 2.71.



APPEARANCE & ODOR

Dark, orange crystalline powder.



REACTIVITY & CONDITIONS TO AVOID

Stable. Avoid raising dust. Incompatible with strong acids and oxidizing agents. Avoid heat.



FIRE HAZARDS

Toxic fume of ammonia, nitrogen oxides or sulfur oxides emitted during fire.          Firefighters wear

SCBA. NFPA # 1-0-1.



EXTINGUISHER                                                            FLASHPOINT    LEL    UEL

Water spray, carbon dioxide or dry chemical.                            N/A           N/A    N/A



HEALTH HAZARDS

The chemical, physical and toxicological properties have not been fully investigated. Irritating

to mucous membranes and upper respiratory tract. May be harmful by inhalation, ingestion or

absorption. Exposure can cause digestive tract disturbances and diarrhea. OSHA PEL/ACGIH TLV

not established. LD/TD no data. No evidence of carcinogenicity.



SPECIAL PRECAUTIONS

Wear goggles, rubber gloves and clothing while handling. Use good ventilation or suitable

respirator if dust is raised. This product is supplied SOLELY for use in RESEARCH AND

DEVELOPMENT by or under the supervision of a TECHNICALLY QUALIFIED INDIVIDUAL, Who should be

FULLY COGNIZANT of the procedures for working with chemical products of this type as described

at 40 CFR 720.36.



FIRST AID

Wash skin with plenty of soap and water. Flush eyes thoroughly with water. If swallowed, rinse

out mouth with water. Get medical attention. If inhaled, remove to fresh air. If breathing

is difficult, give oxygen. Use CPR if needed.



SPILLS & LEAKS

Sweep up, minimizing dust formation.     Place in a suitable container and hold for recovery or

suitable hazardous waste disposal.





CATALOG #                                                     PREPARED BY                    DATE

3676                                                              MDM                       July 7, 2005