NIOSH Pocket Guide to Chemical Hazards

1-Octanethiol CAS 111-88-6
CH3(CH2)7SH RTECS
Synonyms & Trade Names
1-Mercaptooctane, n-Octyl mercaptan, Octylthiol, 1-Octylthiol
DOT ID & Guide
1228 131
Exposure
Limits
NIOSH REL: C 0.5 ppm (3.0 mg/m3) [15-minute]
OSHA PEL: none
IDLH N.D. Conversion 1 ppm = 5.98 mg/m3
Physical Description
Water-white liquid with a mild odor.
MW: 146.3
BP: 390°F
FRZ: -57°F
Sol: Insoluble
VP(212°F): 3 mmHg
IP: ?

Sp.Gr: 0.84
Fl.P(oc): 115°F
UEL: ?
LEL: ?

Class II Combustible Liquid: Fl.P. at or above 100F and below 140F.
Incompatibilities & Reactivities
Oxidizers, reducing agents, strong acids & bases, alkali metals
Measurement Methods
NIOSH 2510
Personal Protection & Sanitation
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
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; lassitude (weakness, exhaustion), cyanosis, increased respiration, nausea, drowsiness, headache, vomiting
Target Organs Eyes, skin, respiratory system, blood, central nervous system
See also: INTRODUCTION