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1 4 Butynediol
1 4 Butynediol

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1 4 Butynediol
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Product: 1 4 Butynediol

High Quality
Earliest Shipment
Competitive price
Professional Service


1,4-Butynediol is an organic compound that is an alkyne and a diol. This yellow crystalline solid is soluble in water and ethanol.



IUPAC name[hide]But-2-yne-1,4-diol
Other names[hide]Butynediol
CAS number110-65-6 Y
ChemSpider7775 Y
KEGGC02497 Y
Jmol-3D imagesImage 1
[show]InChI=1S/C4H6O2/c5-3-1-2-4-6/h5-6H,3-4H2 Y
Key: DLDJFQGPPSQZKI-UHFFFAOYSA-N Y InChI=1/C4H6O2/c5-3-1-2-4-6/h5-6H,3-4H2
Molecular formulaC4H6O2
Molar mass86.09 g/mol
Density1.2 g/cm³
Melting point

52-55 °C

Boiling point

238 °C

NFPA 704



1,4-Butynediol can be produced in the Reppe synthesis, where formaldehyde and acetylene are the reactants:


Several patented production methods use copper bismuth catalysts coated on an inert material. The normal temperature range for the reaction is 90°C up to 150°C, depending on the pressure used for the reaction which can range from 1 to 20 bar.[2]

[edit] Applications

1,4-Butynediol is a precursor to 1,4-butanediol. It is also used in the manufacture of plant protection agents, pesticides, textile additives, corrosion inhibitors, platicizers, synthetic resins, and polyurethanes.[3] It is the major raw material of vitamin B6.[4] It is also used for brightening, preserving, and inhibiting nickel plating.

[edit] Safety

1,4-Butynediol is corrosive and irritates the skin and eyes.[3]

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