1,2-Butanediol | |
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Butane-1,2-diol |
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Other names
1,2-Dihydroxybutane |
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Identifiers | |
CAS number | 584-03-2 |
ChemSpider | 10948 |
UNII | RUN0H01QEU |
EC-number | 209-527-2 |
ChEBI | CHEBI:52682 |
RTECS number | EK0380000 |
Jmol-3D images | Image 1 Image 2 |
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Properties[1][2][3] | |
Molecular formula | C4H10O2 |
Molar mass | 90.121 g/mol |
Density | 1.0023 g/cm3 (20 °C) |
Melting point |
−50 °C[note 1] |
Boiling point |
195–196.9 °C |
Solubility in water | miscible |
Solubility | soluble in ethanol, acetone; sparingly soluble in esters and ethers; insoluble in hydrocarbons |
Refractive index (nD) | 1.4378 (20 °C) |
Viscosity | 7.3 mPa s (20 °C) |
Thermochemistry | |
Std enthalpy of formation ΔfH |
−532.8 kJ/mol |
Std enthalpy of combustion ΔcH |
−2479 kJ/mol |
Hazards[4] | |
MSDS | ICSC 0395 |
EU Index | not listed |
Flash point | 90 °C |
Related compounds | |
Related butanediols | 1,3-Butanediol 1,4-Butanediol 2,3-Butanediol |
Related compounds | Ethylene glycol Propylene glycol 2-Hydroxybutyraldehyde 2-Hydroxybutyric acid α-Ketobutyric acid |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
1,2-Butanediol is a vic-diol (glycol) first described by Charles-Adolphe Wurtz in 1859.[5] It is produced industrially as a byproduct of the production of 1,4-butanediol from butadiene,[6] and is also a byproduct of the catalytic hydrocracking of starches and sugars such as sorbitol to ethylene glycol and propylene glycol.[7][note 2] It is used to produced polyester resins and plasticizers,[3][6] and is a potential feedstock for the industrial production of α-ketobutyric acid, a precursor to many amino acids.[8]