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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
There are nine isomers of n-heptane, among which n-heptane [CH3(CH2)5CH3] is the most important. It is a colorless flammable liquid. It is almost 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 1.0Chemicalbook~6.0% (volume). It is separated from petroleum fractions. It vibrates violently when it burns and explodes in the cylinder. Its octane number is set as zero. Mixtures of various proportions with *iso-octane (octane number is set as 100) are often used as standards 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 | n |
| 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 λ: 225 nm Amax: ≤0.10 λ: 250 nm Amax: ≤0.01 λ: 300-400 nm Amax: ≤0.005 |
| 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 0.40 at 210nm 1.0 at 197nm |
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
It is mainly used as a standard for determining octane number, and can also be used as an anesthetic, solvent, raw material for organic synthesis, and preparation of experimental reagents.
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