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Dimethyl chlorothiophosphate

Dimethyl chlorothiophosphate structure

CAS No.: 2524-03-0

Chemical Name:: Dimethyl chlorothiophosphate

Synonyms: MCT;Dimethyl thiophosphorochloridate;DMPCT;NA 2267;U.N. 2267;METHYL PCT;(CH3O)2P(S)Cl;AURORA KA-1651;Dimethylthiophosphoryl;Dimethylchlorthiofosfat

CBNumber:: CB0150185

Molecular Formula:: C2H6ClO2PS

Molecular Weight:: 160.56

MDL Number:: MFCD00008353

MOL File:: 2524-03-0.mol

Last updated:2024-03-14 15:18:25

Dimethyl chlorothiophosphate Properties

Boiling point	66-67 °C16 mm Hg(lit.)
Density	1.322 g/mL at 25 °C(lit.)
vapor pressure	0.67 psi ( 20 °C)
refractive index	n20/D 1.482(lit.)
Flash point	221 °F
solubility	Chloroform (Sparingly), Methanol (Slightly)
form	Oil
color	Colourless
Water Solubility	slowly hydrolyzes
Stability	Moisture Sensitive
CAS DataBase Reference	2524-03-0(CAS DataBase Reference)
FDA UNII	8D5OSC5UN4
NIST Chemistry Reference	Phosphorochloridothioic acid, o,o-dimethyl ester(2524-03-0)
EPA Substance Registry System	Dimethyl chlorothiophosphate (2524-03-0)

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS05,GHS06
Signal word	Danger
Hazard statements	H318-H412-H330-H335-H302-H315-H312
Precautionary statements	P273-P501-P264-P270-P301+P312-P330-P501-P280-P302+P352-P312-P322-P363-P501-P264-P280-P302+P352-P321-P332+P313-P362-P280-P305+P351+P338-P310-P260-P271-P284-P304+P340-P310-P320-P403+P233-P405-P501
Hazard Codes	T
Risk Statements	23/24/25-34-23-21/22
Safety Statements	23-26-36/37/39-45-24/25
RIDADR	UN 2267 6.1/PG 2
WGK Germany	3
RTECS	TD1830000
HazardClass	6.1(a)
PackingGroup	II
HS Code	29309099
Toxicity	mouse,LC50,inhalation,320mg/m3/2H (320mg/m3),"Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 56, 1982.

Dimethyl chlorothiophosphate Chemical Properties,Uses,Production

Description

Dimethyl chlorothiophosphate is a colorless tolight amber, combustible liquid. Molecularweight= 160.56; Specific Gravity (H2O:1) 1.32 at 25℃;Boiling point = 6667℃ at 16 mmHg; Flashpoint= 104.8℃ (oc). Hazard Identification (based onNFPA-704 M Rating System): Health 3, Flammability 2,Reactivity 2. Insoluble in water.

Chemical Properties

clear colorless to light yellow liquid

Uses

Dimethyl chlorothiophosphate is used as an intermediate in the manufacture of insecticides, pesticides, fungicides, oil and gasoline additives, plasticizers, corrosion inhibitors, flame-retardants, and flotation agents.

Preparation

Dimethyl chlorothiophosphate is prepared by reaction of phosphorus pentasulfide & methyl alcohol followed by reaction of the resulting dimethyl phosphorodithioate with chlorine.

General Description

Dimethyl chlorothiophosphate is a colorless to light amber liquid. Used as a chemical intermediate for insecticides, pesticides, and fungicides; oil and gasoline additives; plasticizers; corrosion inhibitors; flame retardants; and flotation agents. Not registered as a pesticide in the U.S. (EPA, 1998)

Reactivity Profile

Organothiophosphates, such as Dimethyl chlorothiophosphate, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.

Health Hazard

Dimethyl chlorothiophosphate is a strong irritant to the eyes, skin, and mucous membranes.

Fire Hazard

Dimethyl chlorothiophosphate may burn but does not ignite readily. Dimethyl chlorothiophosphate may ignite combustibles (wood, paper, oil, etc.). When heated Dimethyl chlorothiophosphate emits very toxic fumes of chlorine containing compounds, phosphorus oxides, and sulfur oxides.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by inhalation. Moderately toxic by ingestion and skin contact. Corrosive. When heated to decomposition it emits very toxic fumes of Cl-, POx, and SOx

Potential Exposure

This material is used as a chemicalintermediate for insecticides, pesticides, and fungicides; oiland gasoline additives; plasticizers; corrosion inhibitors;flame retardants; and flotation agents. It is not registered asa pesticide in the United States.[EP

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medical

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Store in tightly closed containers in a cool, wellventilated area. Metal containers involving the transfer ofthis chemical should be grounded and bonded. Where possible, automatically pump liquid from drums or other storagecontainers to process containers. Drums must be equippedwith self-closing valves, pressure vacuum bungs, and flamearresters. Sources of ignition, such as smoking and openflames, are prohibited where this chemical is used, handled,or stored in a manner that could create a potential fire orexplosion hazard. Wherever this chemical is used, handled,manufactured, or stored, use explosion-proof electricalequipment and fittings.

Shipping

Dimethyl thiophosphoryl chloride requires ashipping label of “POISONOUS/TOXIC MATERIALS/CORROSIVE.” This compound falls in DOT Hazard Class6.1 and Packing Group II.

Incompatibilities

Contact with oxidizers may cause therelease of phosphorous oxides. Contact with strong reducingagents, such as hydrides, may cause the formation of flammable and toxic phosphine gas.

Dimethyl chlorothiophosphate Preparation Products And Raw materials

Raw materials

Solid sodium hydroxide DIMETHYLPHOSPHINOTHIOIC CHLORIDE Phosphorus pentasulfide THIOPHOSPHORYL CHLORIDE Phosphorus pentachloride

Dimethyl sulfide Methyl dichloride Sodium hydroxide Cobalt chloride Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts

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Preparation Products

CHLORTHION FENCHLORPHOS Tolclofos-methyl

Dimethyl chlorothiophosphate Spectrum

Dimethyl chlorothiophosphate(2524-03-0)MS Dimethyl chlorothiophosphate(2524-03-0)¹HNMR Dimethyl chlorothiophosphate(2524-03-0)¹³CNMR Dimethyl chlorothiophosphate(2524-03-0)IR1

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O,O’-Dimethylphosphonochloridothioate o,o-Dimethyl chloridothiophosphate O,O-Dimethyl chlorophosphorothioate O,O-Dimethyl chlorothionophosphate O,O-Dimethyl chlorothiophosphate O,O-Dimethyl phosphorothionochloridate O,O-Dimethyl thionophosphorochloridate O,O-Dimethyl thionophosphoryl chloride O,O-Dimethyl thiophosphoric acid chloride O,Odimethylchlorophosphorothioate o,o-dimethylchlorothionophosphate o,o-dimethylchlorothiophosphate O,O-Dimethylchlorthiophosphat O,O-Dimethylester kyseliny chlorthiofosforecne o,o-dimethylesterkyselinychlorthiofosforecne o,o-dimethylesterkyselinychlorthiofosforecne(czech) O,O-Dimethylphosphorochloridothio-nate o,o-dimethylphosphorothionochloridate o,o-dimethylthionophosphorochloridate o,o-dimethylthionophosphorylchloride o,o-dimethylthiophosphoricacidchloride O,O-DIMETHYL PHOSPHOROCHLORIDOTHIOATE O,O-DIMETHYLPHOSPHOROCHLOROTHIOATE O,O-DIMETHYLTHIOPHOSPHORYL CHLORIDE U.N. 2267 O,O-DIMETHYL PHOSPHOROCHLOROIDOTHIONATE DIMETHYLPHOSPHOROCHLOROTHIOATE DMPCT METHYL PCT METHYL PHOSPHOROCHLORIDOTHIOATE METHYL INTERMEDIARY MP-2 (CH3O)2P(S)Cl Chlorodimethoxyphosphine sulfide Dimethylthiophosphoryl Chloridothiophosphoric acid O,O-dimethyl ester Chlorophosphonothioic acid dimethyl ester Dimethyl chlorothiophosphate,97% Dimethyl chlorothiophosphateDimethyl phosphorochloridothioateDimethylthiophosphoryl chloride O,O-Dimethylthiophosphoryl Chloride Methyl Phosphorochloridothioate O,O-DIMETHYLESTEROFPHOSPHOROCHLORIDOTHIOICACID DIMETHYLPHOSPHORCHLORIDOTHIOATE DIMETHYLPHOSPHOROCHLORITHIONATE chlorodimethoxyphosphinesulfide Chlorthiophosphorsαure-O,O-dimethylester Dimethoxythiophosphonyl chloride dimethoxythiophosphonylchloride Dimethoxythiophosphorylchloride Dimethyl chlorothionophosphate Dimethyl chlorothiophospate Dimethyl chlorothiophosphonate Dimethyl phosphochloridothioate Dimethyl phosphorochlorodithioate Dimethyl thionophosphorochloridate Phosphonothioic acid, chloro-, O,O-dimethyl ester phosphonothioicacid,chloro-,o,o-dimethylester Phosphorochloridothioicacid,O,Odimethylester Phosphorochloridothioicacid,O,O-dimethylester PhosphorochloridothioicacidO,O-dimethylester