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TRICHLORPHON ICSC: 0585
Date of Peer Review: October 1997

Dimethyl-2,2,2-trichloro-1-hydroxyethylphosphonate
Trichlorphene
(2,2,2-Trichloro-1-hydroxyethyl) phosphonic acid dimethyl ester
Chlorofos
CAS # 52-68-6 C4H8Cl3O4P
RTECS # TA0700000 Molecular mass: 257.4
UN # 2783
EC Index # 015-021-00-0
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE! AVOID EXPOSURE OF (PREGNANT) WOMEN! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Sweating. Nausea. Vomiting. Dizziness. Pupillary constriction, muscle cramp, excessive salivation. Laboured breathing. Convulsions. Unconsciousness. Symptoms may be delayed (see Notes).
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin MAY BE ABSORBED! (See Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain. Pupillary constriction. Blurred vision.
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 Nausea. Vomiting. Weakness. Abdominal cramps. Diarrhoea. Pupillary constriction, muscle cramps, excessive salivation. Laboured breathing. Unconsciousness.
Do not eat, drink, or smoke during work.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Rest. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting, then remove to safe place. Do NOT let this chemical enter the environment. Personal protection: A/P2 filter respirator for organic vapour and harmful dust.
Do not transport with food and feedstuffs. Marine pollutant.
EU Classification
Symbol: Xn, N
R: 22-43-50/53
S: (2-)-24-37-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT7-III
Separated from strong bases, food and feedstuffs. Keep in a well-ventilated room.
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
TRICHLORPHON ICSC: 0585
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS

CHEMICAL DANGERS:
The substance decomposes on heating and on contact with acids and bases producing toxic fumes. Attacks many metals.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (Inhalable fraction) 1 mg/m as TWA; A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2004).
MAK not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on dust forming.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the nervous system by a cholinesterase inhibiting effect, resulting in convulsions, respiratory failure, and death. Cholinesterase inhibitor. Exposure at high level may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the nervous system. Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms.
PHYSICAL PROPERTIES
Melting point: 83-84C
Relative density (water = 1): 1.73
Solubility in water, g/100 ml at 25C: 15.4
Vapour pressure, Pa at 20C: < 0.01
Octanol/water partition coefficient as log Pow: 0.48
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 and fish.
NOTES
Depending on the degree of exposure, periodic medical examination is suggested. The symptoms of acute intoxication do not become manifest until some hours have passed. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. The recommendations on this card apply to the pure form. Commercial formulations are often mixtures including impurities, solvent or other agents which modify toxic and physicochemical properties. Acrol, DEP, DANEX, DIMETOX are trade names.
Card has been partly updated in October 2004 and 2005. See sections Occupational Exposure Limits, EU classification, 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