1,4-Butynediol

1,4-Butynediol is an organic compound that is an alkyne and a diol. It is a colourless, hygroscopic solid that is soluble in water and polar organic solvents. It is a commercially significant compound in its own right and as a precursor to other products.

1,4-Butynediol
Names
Preferred IUPAC name
But-2-yne-1,4-diol
Other names
Butynediol
2-Butyne-1,4-diol
1,4-Dihydroxy-2-butyne
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.445
EC Number
  • 203-788-6
KEGG
RTECS number
  • ES0525000
UNII
UN number 2716
  • 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
    Key: DLDJFQGPPSQZKI-UHFFFAOYAT
  • OCC#CCO
Properties
C4H6O2
Molar mass 86.090 g·mol−1
Appearance Colorless crystalline solid
Density 1.11 g/cm3 (at 20 °C)
Melting point 58 °C (136 °F; 331 K)
Boiling point 238 °C (460 °F; 511 K)
3740 g/L
Hazards
GHS labelling:
Danger
H301, H312, H314, H317, H331, H373
P260, P261, P264, P270, P271, P272, P280, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P312, P314, P321, P322, P330, P333+P313, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
2
1
0
Flash point ~136 °C (277 °F)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
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