# NIOSH Pocket Guide to Chemical Hazards
1-Propanethiol | CAS 107-03-9
CH3CH2CH2SH | RTECS TZ7300000
Synonyms & Trade Names 3-Mercaptopropane, Propane-1-thiol, Propyl mercaptan, n-Propyl mercaptan | DOT ID & Guide 2402 130
Exposure Limits | NIOSH REL: C 0.5 ppm (1.6 mg/m3) [15-minute]
OSHA PEL: none
IDLH N.D. | Conversion 1 ppm = 3.12 mg/m3
Physical Description Colorless liquid with an offensive, cabbage-like odor.
MW: 76.2 | BP: 153°F | FRZ: -172°F | Sol: Slight
VP(77°F): 155 mmHg | IP: 9.195 eV |  | Sp.Gr: 0.84
Fl.P: -5°F | UEL: ? | LEL: ? |
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
Measurement Methods None available
Personal Protection & Sanitation 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
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
See also: INTRODUCTION