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Perchloromethyl mercaptan																				Related Pages
Synonyms & Trade Names
			PCM, PMM, Trichloromethane sulfenyl chloride, Trichloromethyl sulfur chloride
CAS No.
			594-42-3
	RTECS No.
			PB0370000
	DOT ID & Guide
			1670 157

FormulaCl3CSCl
	Conversion
			1 ppm = 7.60 mg/m3
	IDLH
			10 ppmSee: 594423

Exposure Limits
			NIOSH RELTWA 0.1 ppm (0.8 mg/m3)
					OSHA PEL TWA 0.1 ppm (0.8 mg/m3)
	Measurement Methods
			None available 
					
					See: NMAM or OSHA Methods
										
Physical Description
			Pale-yellow, oily liquid with an unbearable, acrid odor.													
										
Molecular Weight185.9	
	Boiling Point297°F (Decomposes)
	Freezing Point?
	SolubilityInsoluble
	Vapor Pressure3 mmHg
	Ionization Potential?											
Specific Gravity1.69	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Liquid, but will support combustion.
Incompatibilities & Reactivities
			Alkalis, amines, hot iron, water
					[Note: Corrosive to most metals. Forms HCl, sulfur & CO2 on contact with water.]
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose, throat; lacrimation (discharge of tears); cough, dyspnea (breathing difficulty), deep breath pain, coarse rales; vomiting; pallor, tachycardia; acidosis; anuria; liver, kidney damage
Target Organs
			Eyes, skin, respiratory system, liver, kidneys
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**No recommendation
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 1 ppm**: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*(APF = 10) Any supplied-air respirator***Up to 2.5 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)***Up to 5 ppm**: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)*(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode*(APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Up to 10 ppm**: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode**Emergency or planned entry into unknown concentrations or IDLH conditions:** (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus**Escape:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0311
					  MEDICAL TESTS: 0180

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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