Chlorfenvinphos

  • O,O-Diethyl-O-(2-chloro-1-(2,4-dichlorophenyl)vinyl)phosphate
  • 2-Chloro-1-(2,4-dichlorohenyl)vinyldiethyl phosphate
Formula
C12H14Cl3O4P
Structure
Description
Amber-colored liquid with a mild chemical odor.
Uses
Acaricide, insecticide.

Registry Numbers and Inventories.
CAS
470-90-6
EC (EINECS/ELINCS)
207-432-0
EC Index Number
015-071-00-3
EC Class
Very toxic; Toxic; Dangerous for the Environment
RTECS
TB8750000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Human Data
UN (DOT)
3018
Merck
12,2137
Beilstein/Gmelin
2338385
EPA OPP
84101
Swiss Giftliste 1
G-3960
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C12H14Cl3O4P
Formula mass
359.57
Melting point, °C
-23 to -19
Boiling point, °C
120 (0.001 torr)
Vapor pressure, mmHg
0.000004
Density
1.36 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.5272 (20 C)
Partition coefficient, pKow
3.82

Hazards and Protection.
Storage
Protect from moisture and store in glass or polyethylene lined containers.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear face mask and neoprene apron when unloading or handling containers containing powder, dust, or granular formulations.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) In case of spill or leak, do not touch spilled material; stop leak if you can do it without risk. Use water spray to reduce vapors. Small spills: take up with sand or other non-combustible absorbent material and place into containers for later disposal. Large spills: dike far ahead of spill for later disposal. Keep unnecesary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site.
Stability
Slowly hydrolyzed by water or acid, 50% decomp occurs at 38 C in greater than 700 hr at pH 1.1, Greater than 400 hr at pH 9.1, but unstable in alkali--at 20 C 50% loss occurs in 1.28 Hr at pH 13.
Incompatibilities
Incompatible with alkaline materials.
Decomposition
When heated to decomposition it emits very toxic fumes of hydrogen chloride and phosphorus oxides.

Fire.
Fire fighting
(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Move container from fire area if you can do it without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material. Wear positive pressure breathing apparatus and special protective clothing.(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam.
Fire potential
This material may burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
2
Exposure effects
Early giddiness, anxiety headache, and restlessness followed by ataxia, drowsiness, and confusion are common with moderate to severe exposures. Fasciculations, profound weakness, coma and seizures may develop in severe cases. CNS depression and seizures may be more common in children than adults.
   Ingestion
Nausea, vomiting, abdominal cramps, and diarrhea are common muscarinic effects.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Sweating is a consistent but not universal sign.
   Eyes
Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur in severe poisonings. Opsoclonus has occurred rarely. Salivation commonly occurs.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
3018
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
CVP