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n-Heptane Cas 142-82-5 Aliphatic hydrocarbon Dipropylmethane 99.9%
This high-purity n-Heptane is a clear, colorless, and highly volatile liquid with a mild gasoline-like odor. Widely used as a solvent in HPLC, environmental testing, and automotive applications, it is an industry standard for octane rating.
N-Heptane is a clear liquid which is highlyflammable and volatile with a mild, gasoline-like odor. Theodor threshold is 40- 547 ppm; also reported at 230 ppm.Molecular weight = 100.23; Specific gravity (H2O:l)= 0.68;Boiling point = 98.39C; FreezingMelting point= - 90.6℃;Vapor pressure = 40 mmHg at 25℃; Flash point= 一4℃;Autoignition temperature = 204℃.285℃. Explosivelimits:LEL= 1.1%; UEL= 6.7%.Hazard Identification(basedonNFPA-704 M Rating System): Health 1,Flammability 3, Reactivity 0. Practically insoluble in water;solubility = 0.0003%.
Chemical Properties
N-Heptane is a flammable liquid, present in crude oil and widely used in the auto- mobile industry. For example, as a solvent, as a gasoline knock testing standard, as automotive starter fl uid, and paraffi nic naphtha. n-Heptane causes adverse health effects in occupational workers, such as CNS depression, skin irritation, and pain. Other compounds such as n-octane (CH 3 (CH 2 ) 6 CH 3 ), n-nonane (CH 3 (CH 2 ) 7 CH 3 ), and n-decane (CH 3 (CH 2 ) 8 CH 3 ) have different industrial applications. Occupational workers exposed to these compounds also show adverse health effects. In principle, manage- ment of these aliphatic compounds requires proper handling and disposal to avoid health problems and to maintain chemical safety standards for safety to workers and the living environment.n-Heptane is a clear liquid which is highly flammable and volatile with a mild, gasoline-like odor. The odor threshold is 40 547 ppm; also reported @ 230 ppm.
Physical properties
Clear, colorless, very flammable liquid with a faint, pleasant odor resembling hexane or octane. Based on a triangle bag odor method, an odor threshold concentration of 670 ppbv was reported by Nagata and Takeuchi (1990).
Definition
✦ A colorless liquid alkane obtained from petroleum refining. It is used as a solvent.
✦ Heptane: A liquid straight-chainalkane obtained from petroleum,C7H16; r.d. 0.684; m.p. -90.6°C; b.p.98.4°C. In standardizing octanenumbers, heptane is given a valuezero.
✦ Air & Water Reactions: Highly flammable. Insoluble in water.
✦ Reactivity Profile: HEPTANE is incompatible with the following: Strong oxidizers .
✦ Hazard: Toxic by inhalation. Flammable, dangerous fire risk.
Production Methods
Heptane is produced in refining processes. Highly purified heptane is produced by adsorption of commercial heptane on molecular sieves.
Synthesis Reference(s) Tetrahedron Letters, 3, p. 43, 1962 DOI: 10.1007/BF01499754
Uses
✦ Suitable for HPLC, spectrophotometry, environmental testing
✦ As standard in testing knock of gasoline engines.
✦ Heptane is a solvent and viscosity-decreasing agent.
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