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DICHLORVOS ICSC: 0690
Date of Peer Review: March 1998

2,2-Dichlorovinyl dimethyl phosphate
Phosphoric acid, 2,2-dichloroethenyl dimethyl ester
DDVP
CAS # 62-73-7 C4H7Cl2O4P / CCl2=CHOPO(OCH3)2
RTECS # TC0350000 Molecular mass: 220.98
UN # 3018
EC Index # 015-019-00-X
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


EXPOSURE
STRICT HYGIENE! AVOID EXPOSURE OF (PREGNANT) WOMEN! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Convulsions. Unconsciousness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin MAY BE ABSORBED! Redness. Pain. (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
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 Abdominal cramps. Diarrhoea. Vomiting. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment. Personal protection: chemical protection suit including self-contained breathing apparatus.
Do not transport with food and feedstuffs. Severe marine pollutant.
EU Classification
Symbol: T+, N
R: 24/25-26-43-50
S: (1/2-)-28-36/37-45-61
UN Classification
UN Hazard Class: 6.1

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT6-II
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. See Chemical Dangers. Well closed. 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
DICHLORVOS ICSC: 0690
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO AMBER LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes producing toxic fumes including phosphorus oxides, phosgene and chlorine fumes. Attacks metal, plastic and rubber.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.1 ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued; SEN; (ACGIH 2004).
MAK: 0.11 ppm, 1 mg/m; skin absorption (H); Peak limitation category: II(2); Pregnancy risk group: C; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20C; on spraying or dispersing, however, much faster.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the skin. The substance may cause effects on the central nervous system. Cholinesterase inhibitor. Exposure above the OEL may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms. This substance is possibly carcinogenic to humans.
PHYSICAL PROPERTIES
Boiling point at 2.7 kPa: 140C
Relative density (water = 1): 1.4
Solubility in water: moderate
Vapour pressure, Pa at 20C: 1.6
Flash point: >80C
Octanol/water partition coefficient as log Pow: 1.47
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms.
NOTES
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. Do NOT take working clothes home. Do NOT use in the vicinity of a fire or a hot surface, or during welding. Dedevap, Nogas, Nuvan, Phosvit, Vapona, Bay19149 are trade names. Also consult publication Environmental Health Criteria No. 79, Health Safety Guide No. 18. 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
See Also:
        Dichlorvos (EHC 79, 1988)
        Dichlorvos (IARC Summary & Evaluation, Volume 53, 1991)
        Dichlorvos (PDS)
        Dichlorvos (PIM 185)