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TEMEPHOS ICSC: 0199
Date of Peer Review: March 1995

O,O,O',O'-Tetramethyl O,O'-thiodi-p-phenylene bis(phosphorothioate)
O,O'-(Thiodi-4,1-phenylene) bis(O,O-dimethylphosphorothioate)
Phosphorothioic acid, O,O'-(thiodi-4,1-phenylene) O,O,O',O'-tetramethyl ester
CAS # 3383-96-8 C16H20O6P2S3
RTECS # TF6890000 Molecular mass: 466.5
UN # 2783
EC Index #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water spray, foam, powder, carbon dioxide.
EXPLOSION

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT DISPERSION OF DUST!

Inhalation
Ventilation (not if powder), local exhaust, or breathing protection.
Fresh air, rest.
Skin
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: P3 filter respirator for toxic particles.
Do not transport with food and feedstuffs. Marine pollutant.
EU Classification
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT7-III
Separated from food and feedstuffs. Well closed.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
TEMEPHOS ICSC: 0199
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS OR WHITE CRYSTALS.

CHEMICAL DANGERS:
The substance decomposes on heating or on burning producing toxic fumes such as phosphorus oxides and sulfur oxides. Reacts with strong acids and strong bases (hydrolysis).

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 mg/m as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
Cholinesterase inhibition in animals.

PHYSICAL PROPERTIES
Melting point: 30.0-30.5C
Solubility in water: none
Octanol/water partition coefficient as log Pow: 5.96
ENVIRONMENTAL DATA
The substance is toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to honey bees.
NOTES
Carrier solvents used in commercial formulations may change physical and toxicological properties. Abate, Abathion, Swebate, Nimitex and Biothion are trade names. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005
See Also:
        Temephos (PDS)
        Temephos (PIM 129)