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NIOSH

TEMEPHOS

ICSC: 0199

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
C16H20O6P2S3
Molecular mass: 466.5
ICSC # 0199 		CAS # 3383-96-8
RTECS # TF6890000
UN # 2783
April 17, 2007 Validated

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! PREVENT GENERATION OF MISTS!

•INHALATION Dizziness. Nausea. Muscle twitching. Sweating. Pupillary constriction, muscle cramp, excessive salivation. Vomiting. Diarrhoea. Laboured breathing. Convulsions. Unconsciousness.
Ventilation (not if powder), local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
•SKIN MAY BE ABSORBED! (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer immediately for medical attention.
•EYES Blurred vision.
Face shield or eye protection in combination with breathing protection.
Rinse with plenty of water (remove contact lenses if easily possible). Refer for medical attention.
•INGESTION Abdominal cramps. (see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: filter respirator for organic gases and particulates adapted to the airborne concentration of the substance Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers: if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place.
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs . Well closed. Store in an area without drain or sewer access.
Do not transport with food and feedstuffs.
Marine pollutant.
UN Hazard Class: 6.1
UN Packing Group: III
Signal: Danger
Skull-Health haz-Enviro
Toxic in contact with skin
Harmful if swallowed
Harmful if inhaled
Causes damage to nervous system
Very toxic to aquatic life
Very toxic to aquatic life with long lasting effects
ICSC: 0199 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

TEMEPHOS

ICSC: 0199

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS OR WHITE CRYSTALS OR LIQUID . 07, because mp = 30 C.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating or on burning producing toxic fumes including phosphorus oxides and sulfur oxides .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as TWA) 1 mg/m3
Inhalable fraction and vapor
(skin); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2006).
MAK not established.
OSHA PEL†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH IDLH: N.D. See: IDLH INDEX


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. m by inhalation of its aerosol, at update 2007.;

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C

EFFECTS OF SHORT-TERM EXPOSURE:
Cholinesterase inhibition. The substance may cause effects on the nervous system , resulting in convulsions and respiratory depression. The effects may be delayed. Medical observation is indicated. Exposure far above the OEL may result in death. 13781000 and 13782000

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms.

PHYSICAL
PROPERTIES

Boiling point (decomposes): 120-125°C
Melting point: 30°C
Density: 1.3
g/cm3
Solubility in water:
none
Vapour pressure, Pa at 25°C:
negligible
Octanol/water partition coefficient as log Pow: 5.96

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms. This substance may be hazardous in the environment; special attention should be given to honey bees. Bioaccumulation of this chemical may occur. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal. m toxic at update 2007.; toxic by direct contac; LD5O topical 1.55ug/bee), 24; ted BCF between 1293 and 19934), added at update 2007. PR-decision to check for supporting data;

N O T E S

Depending on the degree of exposure, periodic medical examination is suggested. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. Carrier solvents used in commercial formulations may change physical and toxicological properties. The technical grade (90-95%) is a brown, viscous liquid. Abate, Abathion, Swebate, Nimitex and Biothion are trade names. t update 2006.;
Transport Emergency Card: TEC (R)-61GT7-III

ADDITIONAL INFORMATION



ICSC: 0199 TEMEPHOS
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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