2-Methyl-3-butyn-2-ol

0.318

0.28

0.8672 (USCG, 1999) - Less dense than water; will float

Density (gas): 0.9 kg/m³

Relative density of the vapour/air-mixture at 20 °C (air = 1): 1.04

77 °F (USCG, 1999)

20 °C c.c.

219.2 to 221 °F at 760 mmHg (USCG, 1999)

104-105 °C

36.7 °F (USCG, 1999)

2.6 °C

16.0 [mmHg]

Vapor pressure, kPa at 20 °C: 2

2-methyl-2-hydroxy-3-butyne is a colorless to straw yellow liquid. (USCG, 1999)

Liquid; mp = 2.6 deg C; [Merck Index] Colorless liquid; [Alfa Aesar MSDS]

COLOURLESS LIQUID.

This chemical does not meet GHS hazard criteria for 4.8% (24 of 500) of reports.

Danger

H225 (62.8%): Highly Flammable liquid and vapor [Danger Flammable liquids]

P203, P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P305+P354+P338, P317, P318, P319, P321, P330, 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 500 reports by companies from 20 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Danger

Chemical: 3-Butyn-2-ol, 2-methyl-

Status: Active Update: 18-03-2020 https://echa.europa.eu/registration-dossier/-/registered-dossier/12665

3-Butyn-2-ol, 2-methyl-: Does not have an individual approval but may be used under an appropriate group standard

Special Hazards of Combustion Products: Irritating and toxic gases, such as carbon dioxide and carbon monoxide, may be produced in fire. (USCG, 1999)

Highly flammable. Vapour/air mixtures are explosive. Risk of explosion on contact with copper.

An eye but not skin irritant in rabbits; Not a skin sensitizer in guinea pig modified split adjuvant test; Developmental toxicity observed in rats at doses maternally toxic; [IUCLID] Causes somnolence, lung changes, ataxia, respiratory depression, and general anesthesia in inhalation lethal-concentration studies of mice; Oral LD50 (mouse) = 500 mg/kg; [RTECS] A skin and eye irritant; May cause smarting and reddening of skin if spilled and allowed to remain on clothes; High vapor concentrations may cause mild smarting of eyes and respiratory tract; [CHRIS] An eye irritant; [ICSC] May cause serious eye injury; Harmful by ingestion; [ECHA REACH Registrations] An irritant; Harmful by ingestion; [Alfa Aesar MSDS]

2-METHYL-2-HYDROXY-3-BUTYNE is an alcohol. Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water. Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides.

Fire Extinguishing Agents Not to Be Used: Water.

Use carbon dioxide, foam, dry powder. NO water. In case of fire: keep drums, etc., cool by spraying with water. NO direct contact of the substance with water.

Fresh air, rest.

Rinse skin with plenty of water or shower.

Rinse with plenty of water (remove contact lenses if easily possible).

Rinse mouth.

Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.

Cough.

Redness. Pain.

Dizziness.

Has been used as a pheromone substitute in beetle control; [REPROTOX] Used as an intermediate, laboratory reagent, and in wood treatment; [ECHA REACH Registrations]

Applying Wood Preservatives [Category: Other]