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Chemical Sampling Information (CSI)
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General Description

Synonyms: PMM; Trichloromethyl sulfur chloride; Trichloromethane sulfenyl chloride; Perchloromethanethiol

OSHA IMIS Code Number: 2030

Chemical Abstracts Service (CAS) Registry Number: 594-42-3

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: PB0370000; 47915

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1670 55

NIOSH Pocket Guide to Chemical Hazards, Perchloromethyl mercaptan: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

pale yellow, oily liquid, foul-smelling, strong, acrid odor
molecular weight: 185.87
vapor pressure: 65 mm
molecular formula: CCl4S
boiling point: 300°F

Incompatibilities: Alkalies, amines, hot iron

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.1 ppm, 0.8 mg.m3

Construction Industry: 0.1 ppm, 0.8 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 ppm, 0.76 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.1 ppm TWA

Health Factors

Potential Symptoms: Lacrimation, eye inflammation; nose, throat irritation; cough; dyspnea; deep breath pain, coarse rales; vomiting; pallor; tachycardia; acidosis; anuria

Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14) Suspect carcinogen (HE2)

Affected Organs: Eyes, respiratory system, liver, kidneys, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • Call the Salt Lake Technical Center for assistance.

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 0.3 ppm @ 13.2 um
    class: Mfg

Articles: Reference: Nishikawa,Yoshinori; Kuwata, Kazuhira. . "Analytical Chemistry" 57, 1985, pp1864-8. Title: Liquid Chromatographic Determination of Low . Molecular Weight Alkylthiols in Air via . Derivatization with NBD-Chloride . (7-Chloro-4-Nitro-2,1,3-Benzoxadiazole) Collection: Sep-PAK Florisil coated with NBD-Cl (Tubes . used in OME 40 NBD-CL on XAD-7 may work) Air Vol and FLowrate: 100L at 0.8-1.2L/min Analysis: 2 mL of MeOH were used to dynamically desorb . the derivative. The samples stood at room temp . for 15 minutes before analysis by HPLC. Column: Develosil ODS-3 10cmx4mm at 30 deg C Eluent: 45/55 acetonitrile/water at 1 mL/min. Detector: UV at 425nm or fluorescent at 425 nm excitation . and 510 nm emission. Mercaptans studied: Methyl, ethyl, isopropyl, propyl, . 2-methyl-2-propyl, 2-butyl, . 2-methyl-1-propyl, and 1-butyl

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