# NIOSH Pocket Guide to Chemical Hazards
1-Pentanethiol | CAS 110-66-7
CH3(CH2)4SH | RTECS SA3150000
Synonyms & Trade Names Amyl hydrosulfide, Amyl mercaptan, Amyl sulfhydrate, Pentyl mercaptan | DOT ID & Guide 1111 130
Exposure Limits | NIOSH REL: C 0.5 ppm (2.1 mg/m3) [15-minute]
OSHA PEL: none
IDLH N.D. | Conversion 1 ppm = 4.26 mg/m3
Physical Description Water-white to yellowish liquid with a strong, garlic-like odor.
MW: 104.2 | BP: 260°F | FRZ: -104°F | Sol: Insoluble
VP(77°F): 14 mmHg | IP: ? |  | Sp.Gr: 0.84
Fl.P(oc): 65°F | UEL: ? | LEL: ? |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Oxidizers, reducing agents, alkali metals, calcium hypochlorite, concentrated nitric acid
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately 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; vomiting, diarrhea; dermatitis, skin sensitization
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION