NIOSH logo and tagline

1-Octadecanethiol

Related Pages
Synonyms & Trade Names
1-Mercaptooctadecane, Octadecyl mercaptan, Stearyl mercaptan
CAS No.
2885-00-9
RTECS No.
DOT ID & Guide
1228 131(liquid)
Formula
CH₃(CH₂)₁₇SH
Conversion
1 ppm = 11.72 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
C 0.5 ppm (5.9 mg/m3) [15-minute]
OSHA PEL
none
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Solid or liquid (above 77°F).
Molecular Weight
286.6
Boiling Point
?
Melting Point
77°F
Solubility
Insoluble
Vapor Pressure
?
Ionization Potential
?
Specific Gravity
0.85
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Combustible Liquid
Incompatibilities & Reactivities
Oxidizers, reducing agents, strong acids & bases, alkali metals
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; headache, dizziness, lassitude (weakness, exhaustion), cyanosis, nausea, convulsions
Target Organs
Eyes, skin, respiratory system, central nervous system, blood
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
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

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1622
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health