HEPTANE†

Chemical Identification
Chemical Identification
CAS # 142-82-5
Formula
 

C₇H₁₆

Synonyms
 

n-heptane (normal heptane), dipropyl methane

Physical Properties
Physical Properties
Physical description Colorless liquid with a gasoline-like odor.
Boiling point 209°F Molecular weight 100.2
Freezing point/melting point -131°F Vapor pressure 40 mmHg
Flash point 25°F Vapor density
Specific gravity 0.68 Ionization potential 9.90 eV
Lower explosive limit (LEL) 1.05% Upper explosive limit (UEL) 6.7%
NFPA health rating 1 NFPA fire rating 3
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1371
Sampling group OVSG-1
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
 

80 min

Sampling volume (TWA)*
 

4 L

Sampling flow rate (TWA)*
 

0.05 L/min

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments GC-FID
Method reference OSHA 5000 (fully validated)
Notes
 

 

Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

500 ppm (2000 mg/m³)

REL-TWA
 

85 ppm (350 mg/m³)

TLV-TWA
 

400 ppm [1979]

PEL-TWA
 

400 ppm (1600 mg/m³)

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

500 ppm [1979]

PEL-STEL
 

500 ppm (2000 mg/m³)

PEL-C
 

 

REL-C
 

440 ppm (1800 mg/m³) [15 minutes]

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Notes:
 

See 29 CFR 1910.1000 Table Z-1.

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 

750 ppm

Carcinogenic classifications: EPA-D Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - N-Heptane

NIOSH: Pocket Guide to Chemical Hazards - n-Heptane

Literature References

 

Last Updated Date : 04/13/2021