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Heptane structure
Chemical Name:
Eptani;Heptan;n-C7H16;HEPTANE;heptanes;Heptanen;1-HEPTANE;N-HEPTANE;ALKANE C7;Heptane>
Molecular Formula:
Formula Weight:
MOL File:

Heptane Properties

Melting point:
−91 °C(lit.)
Boiling point:
98 °C(lit.)
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
Flash point:
30 °F
storage temp. 
Store at +5°C to +30°C.
acetone: miscible(lit.)
>14 (Schwarzenbach et al., 1993)
Specific Gravity
0.684 (20/4℃)
Relative polarity
Evaporation Rate
Odor Threshold
explosive limit
Water Solubility 
practically insoluble
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
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).
Stable. Incompatible with oxidizing agents, chlorine, phosphorus. Highly flammable. Readily forms explosive mixtures with air.
CAS DataBase Reference
142-82-5(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances
175.105; 175.300; 177.1580; 178.2650
EWG's Food Scores
NIST Chemistry Reference
EPA Substance Registry System
Heptane (142-82-5)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H320-H335-H400-H225-H304-H315-H336-H410-H260-H319-H333
Precautionary statements  P233-P240-P241+P242+P243-P264-P271-P280-P301+P310+P331-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P403+P233-P405-P223-P301+P310a-P303+P361+P353-P305+P351+P338-P501a-P210-P301+P310-P331-P370+P378-P403+P235-P261-P273-P501-P304+P340+P312-P391
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
WGK Germany  3
RTECS  MI7700000
Autoignition Temperature 433 °F
HazardClass  3
PackingGroup  II
HS Code  29011000
Toxicity LC (2 hr in air) in mice: 75 mg/l (Lazarew)
NFPA 704

Heptane price More Price(137)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.04365 n-Heptane EMPLURA? 142-82-5 1 L $76.13 2021-03-22 Buy
Sigma-Aldrich HX0080 Heptane 142-82-5 500 mL $91.67 2021-03-22 Buy
Sigma-Aldrich 1.04366 n-Heptane for spectroscopy Uvasol? 142-82-5 500 mL $126.72 2021-03-22 Buy
Sigma-Aldrich 1.04379 n-Heptane for analysis EMSURE? Reag. Ph Eur 142-82-5 1 L $128.57 2021-03-22 Buy
Sigma-Aldrich 1.03654 n-Heptane hypergrade for LC-MS LiChrosolv? 142-82-5 1 L $143 2021-03-22 Buy

Heptane Chemical Properties,Uses,Production

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.

Chemical Properties

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).


Suitable for HPLC, spectrophotometry, environmental testing


As standard in testing knock of gasoline engines.


heptane is a solvent and viscosity-decreasing agent.


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.

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

General Description

Clear colorless liquids with a petroleum-like odor. Flash point 25°F. Less dense than water and insoluble in water. Vapors heavier than air.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

HEPTANE is incompatible with the following: Strong oxidizers .


Toxic by inhalation. Flammable, dangerous fire risk.

Health Hazard

VAPOR: Not irritating to eyes, nose or throat. If inhaled, will cause coughing or difficult breathing. LIQUID: Irritating to skin and eyes. If swallowed, will cause nausea or vomiting.

Fire Hazard

FLAMMABLE. Flashback along vapor trail may occur. Vapor may explode if ignited in an enclosed area.

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reactions; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Potential Exposure

n-Heptane is used in graphics, textiles, adhesives, and coatings; as an industrial solvent and in the petroleum refining process; as a standard in testing knock of gasoline engines.


Schauer et al. (1999) reported heptane in a diesel-powered medium-duty truck exhaust at an emission rate of 470 g/km.
Identified as one of 140 volatile constituents in used soybean oils collected from a processing plant that fried various beef, chicken, and veal products (Takeoka et al., 1996).
Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rate of heptane was 28.9 mg/kg of pine burned. Emission rates of heptane were not measured during the combustion of oak and eucalyptus.
California Phase II reformulated gasoline contained heptane at a concentration of 9,700 mg/kg.
Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 1.82 and 268 mg/km, respectively (Schauer et al., 2002).

Environmental Fate

Biological. Heptane may biodegrade in two ways. The first is the formation of heptyl hydroperoxide, which decomposes to 1-heptanol followed by oxidation to heptanoic acid. The other pathway involves dehydrogenation to 1-heptene, which may react with water forming 1- heptanol (Dugan, 1972). Microorganisms can oxidize alkanes under aerobic conditions (Singer and Finnerty, 1984). The most common degradative pathway involves the oxidation of the terminal methyl group forming the corresponding alcohol (1-heptanol). The alcohol may undergo a series of dehydrogenation steps forming heptanal followed by oxidation forming heptanoic acid. The acid may then be metabolized by β-oxidation to form the mineralization products, carbon dioxide and water (Singer and Finnerty, 1984). Hou (1982) reported hexanoic acid as a degradation product by the microorganism Pseudomonas aeruginosa.
Photolytic. The following rate constants were reported for the reaction of hexane and OH radicals in the atmosphere: 7.15 x 10-12 cm3/molecule?sec (Atkinson, 1990). Photooxidation reaction rate constants of 7.19 x 10-12 and 1.36 x 10-16 cm3/molecule?sec were reported for the reaction of heptane with OH and NO3, respectively (Sablji? and Güsten, 1990). Based on a photooxidation rate constant 7.15 x 10-12 cm3/molecule?sec for heptane and OH radicals, the estimated atmospheric lifetime is 19 h in summer sunlight (Altshuller, 1991).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. Heptane will not hydrolyze because it has no hydrolyzable functional group.


UN1206 Heptanes, Hazard Class: 3; Labels: 3-Flammable liquid.

Toxicity evaluation

The acute mechanism of toxicity is suspected be similar to other solvents that rapidly induce anesthesia-like effects, i.e., a ‘nonspecific narcosis’ because of disruption (solvation) of the integrity of the cellular membranes of the central nervous system (CNS). This disruptive narcosis may also contribute to the pathology seen with chronic toxicity, although the gamma diketone metabolite of n-heptane would be responsible for any delayed peripheral neurotoxicity seen in humans following chronic exposure, similar to the mechanism seen for hexane. Although the mechanism of toxicity of n-heptane, with respect to polyneuropathy, is believed to be similar to hexane, human exposures in the workplace are often a mixture of other solvents and the animal data are not compelling.
Heptane is generally considered to be less toxic than hexane but slightly more toxic than octane. This is probably because it is less volatile than the former but more volatile than the latter (consistent with the nonspecific narcotic mechanism of toxicity of volatile organic compounds). If it is aspirated into the lungs, however, n-heptane will cause adverse effects similar to those seen with petroleum distillates.


May form explosive mixture with air. Strong oxidizers may cause fire and explosions. Attacks some plastics, rubber and coatings. May accumulate static electric charges that can ignite its vapors.

Waste Disposal

Dissolve or mix the material with a combustible solvent and burn in a chemical incinera tor equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

Heptane Preparation Products And Raw materials

Raw materials

Preparation Products

Heptane Suppliers

Global( 407)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shandong Yanshuo Chemical Co., Ltd.
+86-533-7077568 China 60 58
Shanghai Bojing Chemical Co.,Ltd.
+86-21-37127788 CHINA 497 55
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22607 55
Hangzhou FandaChem Co.,Ltd.
+86-571-56059825 CHINA 8909 55
Nanjing ChemLin Chemical Industry Co., Ltd.
025-83697070 CHINA 3013 60
career henan chemical co
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Xiamen AmoyChem Co., Ltd
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Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23035 58
Chongqing Chemdad Co., Ltd
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View Lastest Price from Heptane manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-12-01 N-Heptane
US $10.70 / Kg/Drum 10g 99% 10000kg Hebei Crovell Biotech Co Ltd
2021-11-08 Heptane
US $5.00 / IU 1KG 99% 50 tons Wuhan wingroup Pharmaceutical Co., Ltd
2021-10-29 Heptane
US $150.00 / ASSAYS 10g more than 99.6% 500kg/month HEBEI YINGONG NEW MATERIAL TECHNOLOGY CO.,LTD

Heptane Spectrum

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