ChemicalBook >> CAS DataBase List >>Diethyl chlorothiophosphate

Diethyl chlorothiophosphate

Chemical Name:
Diethyl chlorothiophosphate
Molecular Formula:
Molecular Weight:
MDL Number:
MOL File:
Last updated:2023-05-15 10:43:15

Diethyl chlorothiophosphate Properties

Melting point -75℃
Boiling point 96 °C
Density 1.2 g/mL at 25 °C(lit.)
vapor pressure 1.4 mm Hg ( 50 °C)
refractive index n20/D 1.472(lit.)
Flash point >230 °F
solubility Chloroform (Slightly), Ethyl Acetate (Slightly)
form liquid
color Colorless to Red to Green
Water Solubility hydrolyzes, immiscible
CAS DataBase Reference 2524-04-1(CAS DataBase Reference)
EWG's Food Scores 1
NIST Chemistry Reference Phosphorochloridothioic acid, o,o'-diethyl ester(2524-04-1)
EPA Substance Registry System O,O-Diethyl chlorothiophosphate (2524-04-1)


Risk and Safety Statements

Symbol(GHS)  GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Signal word  Danger
Hazard statements  H302-H311+H331-H314-H411
Precautionary statements  P273-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T,T+
Risk Statements  23/24/25-34-26-21/22
Safety Statements  23-26-36/37/39-45-28A
RIDADR  UN 2751 8/PG 2
WGK Germany  3
RTECS  TD1780000
HazardClass  8
PackingGroup  II
HS Code  29309099

Diethyl chlorothiophosphate price More Price(13)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich D91683 O,O′-Diethyl chlorothiophosphate 97% 2524-04-1 100g $147 2023-01-07 Buy
TCI Chemical D0624 Diethyl Chlorothiophosphate >97.0%(GC)(T) 2524-04-1 25g $20 2023-01-07 Buy
TCI Chemical D0624 Diethyl Chlorothiophosphate >97.0%(GC)(T) 2524-04-1 500g $141 2023-01-07 Buy
TRC D444160 Diethyl Chlorothiophosphate 2524-04-1 25g $85 2021-12-16 Buy
Chem-Impex 37314 O,O-Diethylchlorothiophosphate,98%(Assaybytitration,GC) 98%(Assaybytitration,GC) 2524-04-1 25G $16.8 2021-12-16 Buy
Product number Packaging Price Buy
D91683 100g $147 Buy
D0624 25g $20 Buy
D0624 500g $141 Buy
D444160 25g $85 Buy
37314 25G $16.8 Buy

Diethyl chlorothiophosphate Chemical Properties,Uses,Production

Chemical Properties



Diethyl Chlorothiophosphate is used in the preparation of various organophosporus insecticide including Flupyrazofos (F598620) and Chlorpyrifos (C425300).

General Description

A colorless to light amber liquid with a disagreeable odor. Density 1.196 g / cm3. Boiling point 120°F.Flash point below 100°F. Insoluble in water but soluble in most organic solvents. May be highly toxic and irritating to the eyes and lungs. Used as an intermediate for pesticides, as an oil and gasoline additive, and as a flame retardant.

Air & Water Reactions

Highly flammable. Insoluble in water but soluble in most organic solvents. Contact with moisture in the air produces highly corrosive and toxic fumes containing hydrogen chloride. Decomposes in water producing acidic products.

Reactivity Profile

Diethyl chlorothiophosphate is incompatible with bases (including amines), with strong oxidizing agents, and with alcohols. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].

Health Hazard

TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Bromoacetates and chloroacetates are extremely irritating/lachrymators. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

Flammability and Explosibility


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Ethyl PCT, refined ORTHO,ORTHO-DIETHYLPHOSPHOROCHLORIDOTHIONATE o,o'-diethylthiophosphoric chloride O,Oμ-Diethylthiophosphoric chloride, Diethyl phosphorochloridothionate Diethyl phosphorochlorodithionate Chloridothiophosphoric acid diethyl ester Chloridothiophosphoric acid O,O-diethyl Chloridothiophosphoric acid O,O-diethyl ester Chlorophosphonothioic acid O,O-diethyl ester Diethyl chlorothiophosphate,97% O,O'-Diethyl Phosphorochloridothioate O,O'-Diethyl Phosphorothiochloridate O,O'-Diethylthiophosphoryl Chloride U.N. 2751 Diethyl chlrothiophosphate O,O-Diethyl chloridophosphorothioate O,O-Diethyl chloridothionophosphate o,o-Diethyl chloridothiophosphate O,O-Diethyl chlorothionophosphate O,O-Diethyl chlorothiophosphate O,O-Diethyl chlorothiophosphonate O,O-Diethyl phosphorothionochloridate O,O-Diethyl thionophosphoric acid ester chloride O,O-Diethyl thionophosphoric chloride O,O-Diethyl thionophosphorochloridate O,O-Diethyl thionophosphoryl chloride O,O-Diethyl thiophosphoric acid chloride O,O-Diethyl thiophosphorochloridate o,o-diethylchloridophosphorothioate o,o-diethylchloridothionophosphate o,o-diethylchlorothionophosphate o,o-diethylchlorothiophosphate O,O'-Diethylchlorothiophosphidate o,o-diethylchlorothiophosphonate O,O-Diethylester kyseliny chlorthiofosforecne o,o-diethylphosphorothionochloridate o,o-diethylthionophosphoricacidesterchloride o,o-diethylthionophosphoricchloride o,o-diethylthionophosphorochloridate o,o-diethylthionophosphorylchloride O,O'-DIETHYLTHIOPHOSPHORYL CHLORIDE O,O'-DIETHYL PHOSPHOROCHLORIDOTHIOATE O,O′-Diethyl phosphorochlorido-thionate O,O-DIETHYLPHOSPHOROCHLOROTHIOATE Diethoxythiophosphoryl chloride diethoxythiophosphorylchloride Diethyl phosphorochloridothioate Diethyl phosphorothiochloridate Diethyl phosphorothionochloridate Diethyl thiophosphoric chloride Diethylchlorthiofosfat diethylchlorthiofosfat(czech) diethylphosphorochloridothioate diethylphosphorothiochloridate diethylphosphorothionochloridate Diethylthiophosphoric acid chloride diethylthiophosphoricchloride diethylthiophosphorylchloride,[liquid] dlethylphosphorochlorothioate o,o-diethylthiophosphorochloridate