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1-Propanethiol

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Synonyms & Trade Names
3-Mercaptopropane, Propane-1-thiol, Propyl mercaptan, n-Propyl mercaptan
CAS No.
107-03-9
RTECS No.
TZ7300000
DOT ID & Guide
2402 130
Formula
CH₃CH₂CH₂SH
Conversion
1 ppm = 3.12 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
C 0.5 ppm (1.6 mg/m3) [15-minute]
OSHA PEL
none
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with an offensive, cabbage-like odor.
Molecular Weight
76.2
Boiling Point
153°F
Freezing Point
-172°F
Solubility
Slight
Vapor Pressure
(77°F): 155 mmHg
Ionization Potential
9.195 eV
Specific Gravity
0.84
Flash Point
-5°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Oxidizers, reducing agents, strong acids & bases, alkali metals, calcium hypochlorite
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat, respiratory system; headache, nausea, dizziness, cyanosis; In Animals: liver, kidney damage
Target Organs
Eyes, skin, respiratory system, central nervous system, blood, liver, kidneys
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:Prevent eye contact
Wash skin:No recommendation
Remove:When wet (flammable)
Change:No recommendation
Provide:Eyewash
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

Up to 5 ppm:
(APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)
(APF = 10) Any supplied-air respirator

Up to 12.5 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 25 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 self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

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   ICSC CARD: 1492
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health