Agent Name

Perchloromethyl mercaptan

CAS Number

594-42-3

Formula

C-Cl4-S

Major Category

Toxic Gases & Vapors

Synonyms

(Trichloromethane)sulfenyl chloride; Clairsit; Mercaptan methylique perchlore [French]; Methanesulfenic acid, trichloro-, chloride; Methanesulfenyl chloride, trichloro-; Methanethiol, trichloro-; PCM; PMM; Perchlorinemethylmercaptan; Perchlormethylmerkaptan [Czech]; Perchloro-methyl-mercaptan (DOT); Perchloromethanethiol; Perchloromethyl mercaptan; Perchloromethylmercaptan; Thiocarbonyl tetrachloride; Trichlormethyl sulfur chloride; Trichlorofluoromethane; Trichloromethane sulfenyl chloride; Trichloromethanesulphenyl chloride; Trichloromethanethiol; Trichloromethyl sulfochloride; Trichloromethylsulfenyl chloride; Trichloromethylsulphenyl chloride; [ChemIDplus] UN1670

Category

Other Toxic Gases & Vapors

Description

Pale-yellow, oily liquid with an unbearable, acrid odor; [NIOSH]

Sources/Uses

Used in the production of dyes and fungicides; [ACGIH]

Comments

Exposure to high concentrations may cause pulmonary edema and death. [ACGIH] A severe skin, eye, and respiratory tract irritant; Inhalation of high concentrations can cause pulmonary edema; [ICSC] "Perchloromethyl mercaptan is a lachrymator and has tear gas properties." [CHEMINFO] Liquid may cause severe corneal burns if not rinsed out promptly; [CHRIS]

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TIH

Yes

TLV (ACGIH)

0.1 ppm

PEL (OSHA)

0.1 ppm

IDLH (NIOSH)

10 ppm

Excerpts from Documentation for IDLHs

Other human data: It has been stated that perchloromethyl mercaptan is about onesixth as toxic as phosgene [Prentiss 1937].

Vapor Pressure

3 mm Hg

Odor Threshold Low

0.001 ppm

Lethal Concentration

LC50 (rat) = 11 ppm/1H

Explanatory Notes

Odor threshold from CHEMINFO;

Reference Link

ICSC: Trichloromethanesulfenyl chloride

Adverse Effects
Lacrimator

Yes

Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: