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Perchloromethyl mercaptan

Synonyms & Trade Names
PCM, PMM, Trichloromethane sulfenyl chloride, Trichloromethyl sulfur chloride
CAS No.
594-42-3
RTECS No.
PB0370000
DOT ID & Guide
1670 157
Formula
Cl3CSCl
Conversion
1 ppm = 7.60 mg/m3
IDLH
10 ppm
See: 594423
Exposure Limits
NIOSH REL
: TWA 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.
MW:
185.9
BP:
297°F (Decomposes)
FRZ:
?
Sol:
Insoluble
VP:
3 mmHg
IP:
?
Sp.Gr:
1.69
Fl.P:
NA
UEL:
NA
LEL:
NA
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 canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0311   See MEDICAL TESTS: 0180
 

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