Functional Roles
Industries Served
Physical Properties
physical_description
Pellets or Large Crystals, Liquid; Pellets or Large Crystals; Pellets or Large Crystals, Other Solid; Dry Powder, Liquid; Other Solid; Dry Powder; Liquid
color/form
Needles from benzene
odor
Sweetish
boiling_point
406.4 u00b0F at 760 mmHg (USCG, 1999)
melting_point
260.6 u00b0F (USCG, 1999)
flash_point
265 u00b0F (129 u00b0C) (open cup)
solubility
For more Solubility (Complete) data for Neopentyl glycol (6 total), please visit the HSDB record page.
density
Relative density of the vapour/air-mixture at 20 u00b0C (air = 1): 1.0
vapor_density
Relative vapor density (air = 1): 3.6
vapor_pressure
Vapor pressure, Pa at 20 u00b0C: 30
logp
log Kow = 0.12
stability/shelf_life
Stable under recommended storage conditions.
autoignition_temperature
730 u00b0F (USCG, 1999)
decomposition
When heated to decomposition it emits acrid smoke and irritating fumes.
kovats_retention_index
895
other_experimental_properties
Enthalpy of vaporization: 79.4 kJ/mol at 415 K
GHS / SDS Safety
Danger
Irritant
Corrosive
- H315 (21.1%): Causes skin irritation [Warning Skin corrosion/irritation]
- H319 (22%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H318 (74.9%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
Chemical Identity
| CAS Number | 126-30-7 |
| IUPAC Name | 2,2-dimethylpropane-1,3-diol |
| InChI Key | SLCVBVWXLSEKPL-UHFFFAOYSA-N |
| PubChem CID | 31344 |
| INCI Name | NEOPENTYL GLYCOL |
Synonyms & Trade Names
Full Description
Neopentyl glycol (NPG) is a polyol intermediate with the molecular formula C5H12O2 that functions as a humectant in industrial formulations. This diol compound serves critical roles in coatings & construction and lubricants industries where moisture retention and chemical stability are required. NPG offers a melting point of 260.6°F and flash point of 265°F, providing thermal stability for demanding industrial applications.