English Safety Data Sheet Database 中文版 MSDS

3-methyl-2-pentene

CAS No. 922-61-2 | PubChem CID 12014
Section 1. Identification
Chemical Name3-methyl-2-pentene CAS No.922-61-2
Synonyms Chinese Name3-甲基-2-戊烯
Molecular FormulaC6H12 Molecular Weight84.1595
UN No.2288 Data SourcePubChem (NIH/NLM)
GHS Hazard Classification
Signal Word DANGER
Pictograms GHS02 · Flammable GHS07 · Irritant
Hazard Statements H225H315H319H335
Precautionary Statements P210P233P240P241P242P243P261P264P264+P265P271P280P302+P352P303+P361+P353P304+P340P305+P351+P338P319P321P332+P317P337+P317P362+P364P370+P378P403+P233P403+P235P405P501

Section 2. Hazards Identification

H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]

H315 (90.9%): Causes skin irritation [Warning Skin corrosion/irritation]

H319 (90.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H335 (90.9%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 44 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Section 9. Physical and Chemical Properties

Optical coefficient

Refractive index

Thermal expansion coefficient

Viscosity

Section 11. Toxicological Information

Petroleum distillates are central nervous system depressants and cause pulmonary damage. (A600)

3-Methyl-2-pentene is found in gasoline, which is possibly carcinogenic to humans (Group 2B). (L135)

Petroleum distillates are aspiration hazards and may cause pulmonary damage, central nervous system depression, and cardiac effects such as cardiac arrhythmias. They may also affect the blood, immune system, liver, and kidney. (A600, L1297)

Oral (L400) ; inhalation (L400) ; dermal (L400)

Petroleum distillate poisoning may cause nausea, vomiting, cough, pulmonary irritation progressing to pulmonary edema, bloody sputum, and bronchial pneumonia. At high amounts, central nervous system depression may also occur, with symptoms such as weakness, dizziness, slow and shallow respiration, unconsciousness, and convulsions. Petroleum distillates are also irritating to the skin. (A594)

Treatment is mainly symptomatic and supportive. Gastric lavage, emesis, and the administration of activated charcoal should be avoided, as vomiting increases the risk of aspiration. (A600)

Source: PubChem CID 12014 (NIH/NLM, public domain). Retrieved from PubChem, a public-domain chemistry database maintained by the U.S. National Library of Medicine. Last updated: 2026-08-02 09:45:51.
Disclaimer: This information is compiled for reference only and does not replace the manufacturer's official Safety Data Sheet. Always consult the supplier's SDS before handling any chemical.