ACS/ACS Reagent/Certified ACS
Anhydrous/Dry/Extra Dry/Molecular Sieve
Environmental
GC/Pesticide Residue
HPLC/UHPLC
Heptane
What Is Heptane?
Heptane is a straight-chain alkane and one of the main components of gasoline. In liquid form, heptane and its many isomers are often used as non-polar solvents.
Heptane has nine isomers:
- Heptane (n-heptane)
- 2-Methylhexane (isoheptane)
- 3-Methylhexane
- 2,2-Dimethylpentane (neoheptane)
- 2,3-Dimethylpentane
- 2,4-Dimethylpentane
- 3,3-Dimethylpentane
- 3-Ethylpentane
- 2,2,3-Trimethylbutane (pentamethylethane or triptane)
Exposure to heptane vapors can cause dizziness, stupor, loss of coordination and appetite, nausea, dermatitis, chemical pneumonitis, unconsciousness, and possible neuropathy.
Synonyms: n-Heptane, heptan, heptyl hydride, dipropyl methane, heptanen, septane
Physical and Chemical Properties
| Property | Value | ||
|---|---|---|---|
Molecular Weight
|
100.205 g/mol
|
|
|
Density
|
0.6795 g/mL at 20°C
|
|
|
Boiling Point
|
98.38°C
|
|
|
Melting Point
|
-90.549°C
|
|
|
Flash Point
|
-4°C
|
|
|
Viscosity
|
0.389 mPa·s at 25°C
|
|
|
Dielectric Constant
|
1.92 at 20°C
|
|
|
Dipole Moment
|
0.0 D
|
|
|
UV Cutoff
|
200 nm
|
|
|
Refractive Index
|
1.3855
|
|
|
Vapor Pressure
|
5.33 kPa at 20°C
|
|
|
Vapor Density
|
3.5 (vs. air)
|
|
|
Water Solubility
|
0.03 at 20°C
|
|
|
Heat of Combustion
|
4817 KJ/mol
|
|
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Heat of Vaporization
|
35.6 KJ/mol at 25°C
|
|
|
Surface Tension
|
20.14 mN/m at 20°C
|
|
How Is Heptane Used?
Heptane is used in paints and coatings, rubber cement solvents, outdoor stove fuel, pharmaceuticals, and gasoline. Pure heptane fuel is considered the zero point on the octane rating scale.
Designations and Grades
| Property | Value | ||
|---|---|---|---|
CAS Number
|
142-82-5
|
|
|
MDL Number
|
MFCD00009544
|
|
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RIDAD/UN Number
|
1206
|
|
|
Beilstein Registry
|
1730763
|
|
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EG/EC Number
|
205-563-8
|
|
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NSC Number
|
62784
|
|
|
ICSC Number
|
0657
|
|
|
RTECS Number
|
MI7700000
|
|
|
Grades
Laboratory/Technical
Molecular Biology/Sequencing
Spectrophotometry
Trace Metals