NIOSH Pocket Guide to Chemical Hazards

n-Heptane CAS 142-82-5
CH3[CH2]5CH3 RTECS MI7700000
Synonyms & Trade Names
Heptane, normal-Heptane
DOT ID & Guide
1206 128
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)
IDLH 750 ppm Conversion 1 ppm = 4.10 mg/m3
Physical Description
Colorless liquid with a gasoline-like odor.
MW: 100.2
BP: 209°F
FRZ: -131°F
Sol: 0.0003%
VP(72°F): 40 mmHg
IP: 9.90 eV

Sp.Gr: 0.68
Fl.P: 25°F
UEL: 6.7%
LEL: 1.05%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 1500; OSHA 7
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 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
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
See also: INTRODUCTION   See ICSC CARD: 0657