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n-Heptane

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Synonyms & Trade Names
Heptane, normal-Heptane
CAS No.
142-82-5
RTECS No.
MI7700000
DOT ID & Guide
1206 128
Formula
CH₃[CH₂]₅CH₃
Conversion
1 ppm = 4.10 mg/m3
IDLH
750 ppm
See: 142825
Exposure Limits
NIOSH REL
TWA 85 ppm (350 mg/m3) C 440 ppm (1800 mg/m3) [15-minute]
OSHA PEL
TWA 500 ppm (2000 mg/m3) See Appendix G
Measurement Methods
NIOSH 1500;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a gasoline-like odor.
Molecular Weight
100.2
Boiling Point
209°F
Freezing Point
-131°F
Solubility
0.0003%
Vapor Pressure
(72°F): 40 mmHg
Ionization Potential
9.90 eV
Specific Gravity
0.68
Flash Point
25°F
Upper Explosive Limit
6.7%
Lower Explosive Limit
1.05%
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
dizziness, stupor, incoordination; loss of appetite, nausea; dermatitis; chemical pneumonitis (aspiration liquid); unconsciousness
Target Organs
Skin, respiratory system, central 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 promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

Up to 750 ppm:
(APF = 10) Any chemical cartridge respirator with 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 = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus 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: 0657
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health