Dichlofenthion

  • dichlofention
  • dichlorofenthion
  • o-(2,4-dichlorophenyl) O,O-diethyl phosphorothioate
  • 2,4-Dichloro-Phenyl diethyl phosphorothionate
  • O,O-diethyl o-(2,4-dichlorophenyl) phosphorothioate
  • Diethyl 2,4-dichlorophenyl phosphorothionate
Formula
C10H13Cl2O3PS
Structure
Description
Colorless liquid.
Uses
Nematocide & insecticide.

Registry Numbers and Inventories.
CAS
97-17-6
EC (EINECS/ELINCS)
202-564-5
EC Index Number
015-068-00-7
EC Class
Harmful; Dangerous for the Environment
RTECS
TF0350000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
UN (DOT)
3018
Merck
12,3094
Beilstein/Gmelin
1993440
Beilstein Reference
4-06-00-00939
EPA OPP
321100
Swiss Giftliste 1
G-2481
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C10H13Cl2O3PS
Formula mass
315.16
Boiling point, °C
100 - 101 (0.02 torr)
Vapor pressure, mmHg
0.0006
Density
1.3206 g/cm3 (20 C)
Solubility in water
slightly soluble in water
Refractive index
1.537 (20 C)
Partition coefficient, pKow
5.16

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Workers handling and applying organophosphate pesticides must be given personal protective equipment comprising overalls made of a tight fabric or polyvinyl chloride, gloves, and rubber boots. The eyes should be protected by goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
Non-volatile it is stable to hydrolysis except under strongly alkaline conditions; heating at 175 C for 465 min converted 42% to the s-ethyl isomer. Deteriorates slowly in air at 150 C.
Incompatibilities
Incompatibilities:on contact with acids or acid fumes. Evolves highly toxic chloride fumes.

Fire.
Fire fighting
Small Fires: Dry chemical, carbon dioxide or water spray. Large Fires: Water spray, fog or regular foam.
Fire potential
Combustible 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
3
Exposure effects
Reduced body temperature or elevated body temperature may occur. Low heart rate and abnormally low blood pressure may develop after moderate to severe poisoning. Rapid heart rate, elevated blood pressure, and changes in respiratory rate may also occur. Early giddiness, anxiety headache, and restlessness followed by ataxia, drowsiness, and confusion are common with moderate to severe exposures. Sporadic reports of human birth defects related to organophosphates have not been fully verified.
   Ingestion
Nausea, vomiting, abdominal cramps, and diarrhea are common muscarinic effects. Both painless and frank clinical pancreatitis have been reported.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Profuse sweating is common. Pallor may be noted. Dermal sensitization has been reported.
   Eyes
Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur. 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