{"cas":"142-82-5","name":"heptane","synonyms":["HEPTANE","n-Heptane","142-82-5","Heptan","Heptyl hydride","Dipropyl methane","Dipropylmethane","Gettysolve-C","Skellysolve C","Heptanen","Eptani","DTXSID6024127","456148SDMJ","NSC-62784","DTXCID004127","CHEBI:43098","normal-Heptane","RefChem:6645","205-563-8","MFCD00009544"],"cid":8900,"ghs":{"pictograms":["GHS02","GHS07","GHS08","GHS09"],"signal":null,"classes":["Flam. Liq. 2 (100%)","Asp. Tox. 1 (100%)","Skin Irrit. 2 (100%)","STOT SE 3 (97.6%)","Aquatic Acute 1 (95.4%)","Aquatic Chronic 1 (> 99.9%)","Flammable liquid - category 2","Aspiration hazard - category 1","Skin irritation - category 2","Specific target organ toxicity (single exposure) - category 3","Hazardous to the aquatic environment (chronic) - category 1","Hazardous to the aquatic environment (acute) - category 1","Flammable liquids - Category 2","Skin corrosion/irritation - Category 2","Serious eye damage/eye irritation - Category 2B","Specific target organ toxicity - Single exposure - Category 3 (Narcotic effects, Respiratory tract irritation)","Aspiration hazard - Category 1","Hazardous to the aquatic environment (Acute) - Category 1","Hazardous to the aquatic environment (Long-term) - Category 1","Serious eye damage/eye irritation - Category 2A-2B","Specific target organ toxicity - Single exposure - Category 3 (Respiratory tract irritation, Narcotic effects)","Specific target organ toxicity - Repeated exposure - Category 2 (liver)","Serious eye damage/eye irritation - Category 2","Specific target organ toxicity - Repeated exposure - Category 1 (nervous system)","Flammable agents - 3rd degree","Flam. Liq. 2","Asp. Tox. 1","STOT SE 3","Skin Irrit. 2","Aquatic Acute 1","Aquatic Chronic 1"],"h_statements":["H225 Highly Flammable liquid and vapor","H304 May be fatal if swallowed and enters airways","H315 Causes skin irritation","H336 May cause drowsiness or dizziness","H400 Very toxic to aquatic life","H410 Very toxic to aquatic life with long lasting effects","H225 (100%): Highly Flammable liquid and vapor","H304 (100%): May be fatal if swallowed and enters airways","H315 (100%): Causes skin irritation","H336 (97.6%): May cause drowsiness or dizziness","H400 (95.4%): Very toxic to aquatic life","H410 (> 99.9%): Very toxic to aquatic life with long lasting effects","H319 Causes serious eye irritation","H335 May cause respiratory irritation","H372 Causes damage to organs through prolonged or repeated exposure","H320 Causes eye irritation","H373 May causes damage to organs through prolonged or repeated exposure"],"p_statements":{}},"physical":{"appearance":"N-heptane is a clear colorless liquids with a petroleum-like odor. Flash point 25 °F. Less dense than water and insoluble in water. Vapors heavier than air.","odour":"Gasoline-like odor","boiling_point":"209.1 °F at 760 mmHg (USCG, 1999)","melting_point":"-131 °F (USCG, 1999)","flash_point":"25 °F (USCG, 1999)","water_solubility":"0.0003 % (NIOSH, 2024)","density":"0.6838 at 68 °F (USCG, 1999) - Less dense than water; will float","vapour_density":"3.45 (Air = 1)","vapour_pressure":"37.49 mmHg at 70 °F (USCG, 1999)","log_pow":"log Kow = 4.66","autoignition_temperature":"433 °F (USCG, 1999)"},"transport":{"un_number":null,"un_psn":null,"hazard_class":null,"packing_group":null},"exposure":{"osha_pel":"Vacated 1989 OSHA PEL TWA 400 ppm (1600 mg/cu m); STEL 500 ppm (2000 mg/cu m) is still enforced in some states.","niosh_rel":"Recommended Exposure Limit: 15 Minute Ceiling Value: 440 ppm (1800 mg/cu m)","note":"Auto-sourced from PubChem. NZ WES must be confirmed against MBIE Workplace Exposure Standards table before use."},"first_aid":{"inhalation":"· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.","skin":"Skin: SOAP WASH PROMPTLY - If this chemical contacts the skin, promptly wash the contaminated skin with soap and water. If this chemical penetrates the clothing, promptly remove the clothing and wash the skin with soap and water. Get medical attention promptly.","eye":"Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.","ingestion":null},"data_source":"pubchem","source_url":"https://pubchem.ncbi.nlm.nih.gov/compound/8900","fetched_at":"2026-06-20T06:19:45.697820+00:00","updated_at":"2026-06-20T06:19:45.697820+00:00","content_hash":"03652bf0d69cc409","ttl_days":180,"confidence":"medium","verified_by":""}