English Safety Data Sheet Database 中文版 MSDS

2-hexyne

CAS No. 764-35-2 | PubChem CID 33629
Section 1. Identification
Chemical Name2-hexyne CAS No.764-35-2
Synonymsmethyl propyl acetylene Chinese Name2-已炔
Molecular FormulaC6H1 Molecular Weight82.1436
UN No.3295 Data SourcePubChem (NIH/NLM)
GHS Hazard Classification
Signal Word DANGER
Pictograms GHS02 · Flammable GHS07 · Irritant GHS08 · Health Hazard
Hazard Statements H225H304H315H319H335
Precautionary Statements P210P233P240P241P242P243P261P264P264+P265P271P280P301+P316P302+P352P303+P361+P353P304+P340P305+P351+P338P319P321P331P332+P317P337+P317P362+P364P370+P378P403+P233P403+P235P405P501

Section 2. Hazards Identification

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

H304 (25%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]

H315 (25%): Causes skin irritation [Warning Skin corrosion/irritation]

H319 (25%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H335 (23.1%): 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, P301+P316, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P331, 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 52 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

Colorless liquid; [Alfa Aesar MSDS]

Boiling point

Diamagnetic susceptibility

Excess enthalpy

Heat of solution

Heat of sublimation

Magnetic susceptibility

Mixing enthalpy

Optical coefficient

Phase diagram

Phase equilibrium

Refractive index

Thermal expansion coefficient

Vapor pressure

Vapor-liquid equilibrium

Other Classes -> Aliphatics, Unsaturated

Section 11. Toxicological Information

Neurotoxin - Acute solvent syndrome

Source: PubChem CID 33629 (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 09:44:03.
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.