Prothiofos

  • Tokuthion
  • Dichlorpropaphos
  • Phosphorodithioic acid, O-(2,4-dichlorophenyl) O-ethyl S-propyl ester
Formula
C11H15Cl2O2PS2
Structure
Description
Colorless liquid
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
34643-46-4
EC (EINECS/ELINCS)
252-125-7
22 50/53
RTECS
TD5680000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector
UN (DOT)
3082
Beilstein/Gmelin
1998314
Beilstein Reference
6-06
EPA OPP
128858
New Zealand
Listed

Properties.
Formula
C11H15Cl2O2PS2
Formula mass
345.25
Boiling point, °C
398
Vapor pressure, mmHg
3.5E-6 (25 C)
Density
1.3 g/cm3 20 C)
Solubility in water
Insoluble
Refractive index
1.5698 (20 C)
Heat of vaporization
62.3 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent dust cloud. Avoid inhalation of asbestos dust.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Hydrogen chloride gas, Hydrogen sulfide gas, Phosphorous oxides.

Fire.
Flash Point,°C
194
Fire fighting
Extinguish using Carbon dioxide, dry chemical powder, or appropriate foam. Water spray. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
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
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Harmful. Dangerous for the environment. Harmful if swallowed. Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
   Ingestion
Harmful if swallowed.
   Inhalation
Inhalation of material may be harmful.
   Skin
Contact may cause burns.
   Eyes
See Skin.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
3082
Response guide
Hazard class
9
Packing Group
III