N-Heptane CAS#142-82-5
CAS Number: 142-82-5
Chemical Formula: C7H16
Synonyms:
Eptani
Exxsol heptane
Appearance: Colorless liquid
HS Code: 29011000
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of n-Heptane CAS#142-82-5
n-Heptane has nine isomers, with n-heptane [CH₃(CH₂)₅CH₃] being the most significant. It is a colorless, flammable liquid that is nearly insoluble in water, slightly soluble in alcohol, and soluble in ether and chloroform.Its vapor forms an explosive mixture with air, with an explosion limit of 1.0~6.0% (by volume, source: Chemicalbook). Derived from petroleum fractions, it undergoes intense vibration and explodes in the cylinder when burned.The octane number of n-heptane is defined as zero. Mixtures of n-heptane and isooctane (whose octane number is defined as 100) in various proportions are commonly used as the standard for determining the octane number of gasoline.
Parameters
Melting point | −91 °C(lit.) |
Boiling point | 98 °C(lit.) |
density | 0.684 g/mL at 20 °C |
vapor density | 3.5 (vs air) |
vapor pressure | 40 mm Hg ( 20 °C) |
refractive index | n20/D 1.397 |
Fp | 30 °F |
storage temp. | Store at +5°C to +30°C. |
solubility | acetone: miscible(lit.) |
form | Liquid |
pka | >14 (Schwarzenbach et al., 1993) |
Specific Gravity | 0.684 (20/4℃) |
color | ≤10(APHA) |
Odor | Gasoline. |
Relative polarity | 0.012 |
explosive limit | 1-7%(V) |
Odor Threshold | 0.67ppm |
Water Solubility | practically insoluble |
λmax | λ: 200 nm Amax: ≤1.0 |
Merck | 14,4659 |
BRN | 1730763 |
Henry's Law Constant | 0.901, 1.195, and 1.905(atm?m3/mol) at 26.0, 35.8, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995) |
Exposure limits | NIOSH REL: TWA 85 ppm (350 mg/m3), 15-min ceiling 440 ppm (1,800 mg/m3), IDLH 750 ppm; OSHA PEL: TWA 500 ppm (2,000 mg/m3); ACGIH TLV: TWA 400 ppm, STEL 500 ppm (adopted). |
Dielectric constant | 1.9（20℃） |
Stability: | Stable. Incompatible with oxidizing agents, chlorine, phosphorus. Highly flammable. Readily forms explosive mixtures with air. |
InChIKey | IMNFDUFMRHMDMM-UHFFFAOYSA-N |
LogP | 4.660 |
Surface tension | 21.12mN/m at 293.15K |
CAS DataBase Reference | 142-82-5(CAS DataBase Reference) |
NIST Chemistry Reference | Heptane(142-82-5) |
EPA Substance Registry System | Heptane (142-82-5) |
Absorption | 0.10 at 225nm |
Safety Information
Hazard Codes | F,Xn,N |
Risk Statements | 11-38-50/53-65-67 |
Safety Statements | 9-16-29-33-60-61-62-23 |
RIDADR | UN 1206 3/PG 2 |
OEB | A |
OEL | TWA: 85 ppm (350 mg/m3), Ceiling: 440 ppm (1800 mg/m3) [15-minute] |
WGK Germany | 3 |
RTECS | MI7700000 |
F | 3-10 |
Autoignition Temperature | 433 °F |
TSCA | Yes |
HazardClass | 3 |
PackingGroup | II |
HS Code | 29011000 |
Hazardous Substances Data | 142-82-5(Hazardous Substances Data) |
Toxicity | LC (2 hr in air) in mice: 75 mg/l (Lazarew) |
IDLA | 750 ppm |
Product Application of n-Heptane CAS#142-82-5
Its primary use is as a standard for octane number determination. Additionally, it can serve as an anesthetic, a solvent, a raw material for organic synthesis, and a base material for preparing experimental reagents.
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