IPCS INCHEM Home
DICHLORVOS
ICSC: 0690
Peer-Review Status: 11.04.2014 Validated
2,2-Dichlorovinyl dimethyl phosphate
Phosphoric acid, 2,2-dichloroethenyl dimethyl ester
DDVP
CAS #: 62-73-7 RTECS #: TC0350000
UN #: 3018
EC #: 015-019-00-X
EINECS #: 200-547-7
    Formula: C4H7Cl2O4P / CCl2=CHOPO(OCH3)2
Molecular mass: 220.98

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. Liquid formulations containing organic solvents may be flammable.  NO open flames.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION Risk of fire and explosion if formulations contain flammable/explosive solvents.    In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  IN ALL CASES CONSULT A DOCTOR! FIRST AID: USE PERSONAL PROTECTION. 
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Muscle twitching. Convulsions. Dizziness. Sweating. Wheezing. Laboured breathing. Unconsciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer immediately for medical attention. See Notes. 
Skin MAY BE ABSORBED! Redness. Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer immediately for medical attention. See Notes. 
Eyes Redness. Pain. Pupillary constriction. Blurred vision.  Wear 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 Excessive salivation. Nausea. Vomiting. Abdominal cramps. Diarrhoea. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. See Notes. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Do NOT wash away into sewer. Ventilation. Collect leaking liquid in sealable containers. Absorb liquid in sand or inert absorbent. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs.
Marine pollutant. 
EC 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; UN Pack Group: II 
GHS Classification
Signal: Danger
Fatal if swallowed, in contact with skin or if inhaled
Causes mild skin irritation
May cause an allergic skin reaction
Suspected of causing cancer
Causes damage to nervous system
Causes damage to the nervous system through prolonged or repeated exposure
Very toxic to aquatic life 
skull;toxiccancer;health hazenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H3; F1.  Store only in original container. Well closed. Keep in a well-ventilated room. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-AMBER LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
On combustion, forms toxic and corrosive fumes including phosphorus oxides, phosgene and chlorine. Attacks iron, steel, plastics and rubber. 

Occupational exposure limits
TLV: 0.1mg/m³ as TWA; (skin); (SEN); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2013).
MAK: 0.11 ppm, 1 mg/m³; Peak limitation category: II(2); Pregnancy risk group: C; Skin absorption (H); (DFG 2013). 

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 can be reached rather quickly on evaporation of this substance at 20°C , on spraying or dispersing much faster. 

Effects of short-term exposure
The substance is irritating to the skin. The substance may cause effects on the nervous system by a cholinesterase inhibiting effect. Exposure above the OEL could cause 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 inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. This substance is possibly carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 101.3kPa: 234°C
Relative density (water = 1): 1.4
Solubility in water, g/l at 20°C: 10 (poor)
Relative vapour density (air = 1): 7.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Vapour pressure, Pa at 20°C: 1.6
Flash point: 170°C
Octanol/water partition coefficient as log Pow: 1.47  
The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
Do NOT take working clothes home.
Do NOT use in the vicinity of a fire or a hot surface, or during welding.
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.
Following the disappearance of symptoms from a short-term exposure, delayed effects could become manifest (after several days or weeks).
Carrier solvents used in commercial formulations may change physical and toxicological properties.
If the substance is formulated with solvents also consult the ICSCs of these materials. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations
       Dichlorvos (EHC 79, 1988)
       Dichlorvos (HSG 18, 1988)
       Dichlorvos (FAO Meeting Report PL/1965/10/1)
       Dichlorvos (FAO/PL:CP/15)
       Dichlorvos (FAO/PL:1967/M/11/1)
       Dichlorvos (FAO/PL:1969/M/17/1)
       Dichlorvos (AGP:1970/M/12/1)
       Dichlorvos (WHO Pesticide Residues Series 4)
       Dichlorvos (Pesticide residues in food: 1977 evaluations)
       Dichlorvos (Pesticide residues in food: 1993 evaluations Part II Toxicology)
       Dichlorvos (IARC Summary & Evaluation, Volume 53, 1991)