NIOSH logo and tagline

n-Hexane

Related Pages
Synonyms & Trade Names
Hexane, normal-Hexane, Hexyl hydride
CAS No.
110-54-3
RTECS No.
MN9275000
DOT ID & Guide
1208 128
Formula
CH₃[CH₂]₄CH₃
Conversion
1 ppm = 3.53 mg/m3
IDLH
1100 ppm [10%LEL]
See: 110543
Exposure Limits
NIOSH REL
TWA 50 ppm (180 mg/m3)
OSHA PEL
TWA 500 ppm (1800 mg/m3) See Appendix G
Measurement Methods
NIOSH 1500 , 3800;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a gasoline-like odor.
Molecular Weight
86.2
Boiling Point
156°F
Freezing Point
-219°F
Solubility
0.002%
Vapor Pressure
124 mmHg
Ionization Potential
10.18 eV
Specific Gravity
0.66
Flash Point
-7°F
Upper Explosive Limit
7.5%
Lower Explosive Limit
1.1%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, nose; nausea, headache; peripheral neuropathy: numb extremities, muscle weak; dermatitis; dizziness; chemical pneumonitis (aspiration liquid)
Target Organs
Eyes, skin, respiratory system, central nervous system, peripheral nervous system
Personal Protection/Sanitation
(See protection codes)
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 500 ppm:
(APF = 10) Any supplied-air respirator*

Up to 1100 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(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: 0279   MEDICAL TESTS: 0114
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health