Functional Roles
Industries Served
Physical Properties
physical_description
Very hygroscopic liquid; Pure form is colorless; [Merck Index]
color/form
Pure compound is colorless
odor
Practically odorless
taste
Sweet flavor with bitter aftertaste
boiling_point
207.50 u00b0C. @ 760.00 mm Hg
melting_point
< -50 u00b0C
flash_point
250 u00b0F (121 u00b0C) (Cleveland Open Cup)
solubility
Practically insoluble in aliphatic hydrocarbons, benzene, toluene, carbon tetrachloride, ethanolamines, mineral and linseed oil; soluble in acetone, methyl ethyl ketone, ethanol, dibutyl phthalate, castor oil
density
Relative density (water = 1): 1.00
vapor_density
Relative vapor density (air = 1): 3.2
vapor_pressure
Vapor pressure, Pa at 20 u00b0C: 8
logp
-0.290
optical_rotation
Specific optical rotation: -18.8 deg at 25 u00b0C/D (ethanol) /(R)-(-)isomer/
autoignition_temperature
741 u00b0F (393 u00b0C)
decomposition
When heated to decomposition it emits acrid smoke and irritating fumes.
viscosity
96 cSt at 25 u00b0C
heat_of_vaporization
Heat of vaporization = 16.2 kcal/mol at 25 u00b0C
surface_tension
37.8 dynes/cm at 25 u00b0C
refractive_index
Index of refraction: 1.4401 at 20 u00b0C
dissociation_constants
pKa = 15.1 at 25 u00b0C
kovats_retention_index
1556
other_experimental_properties
1 gal weighs 8.398 lb at room temp; dielectric constant: 28.8 at 25 u00b0C. Very hygroscopic, will absorb 38.5 wt % of water within 144 hrs at 81% relative humidity.
GHS / SDS Safety
Warning
Flammable
- H226 (51.2%): Flammable liquid and vapor [Warning Flammable liquids]
Chemical Identity
| CAS Number | 107-88-0 |
| IUPAC Name | butane-1,3-diol |
| InChI Key | PUPZLCDOIYMWBV-UHFFFAOYSA-N |
| PubChem CID | 7896 |
| INCI Name | BUTYLENE GLYCOL |
Synonyms & Trade Names
Full Description
Butylene Glycol (CAS 107-88-0) is a glycol diol compound with the molecular formula C4H10O2 that functions as a humectant and solvent in industrial applications. This colorless liquid with a boiling point of 207.5°C provides moisture retention and solvency properties for formulations in the beauty & personal care, food & beverage, and pharmaceutical industries. The compound exhibits practical insolubility in aliphatic hydrocarbons and aromatic solvents while maintaining a flash point of 121°C.