Functional Roles
Industries Served
Physical Properties
physical_description
Thick odorless, colorless liquid. Sinks and mixes with water. (USCG, 1999)
color/form
Colorless liquid
odor
Odorless
boiling_point
444 to 450 u00b0F at 760 mmHg (NTP, 1992)
melting_point
-40 u00b0F (NTP, 1992)
flash_point
138 u00b0C (280 u00b0F) - closed cup
solubility
greater than or equal to 100 mg/mL at 75 u00b0F (NTP, 1992)
density
1.023 at 68 u00b0F (USCG, 1999) - Denser than water; will sink
vapor_density
4.63 (NTP, 1992) - Heavier than air; will sink (Relative to Air)
vapor_pressure
1 mmHg at 164.8 u00b0F ; 760 mmHg at 449.2 u00b0F (NTP, 1992)
logp
log Kow = -1.07
stability/shelf_life
Stable under recommended storage conditions.
autoignition_temperature
371 degree C /Dipropylene glycol, mixed isomers and dominant isomer (DPG)/
decomposition
Hazardous decomposition products formed under fire conditions. - Carbon oxides
viscosity
1.07 cP at 20 u00b0C
heat_of_vaporization
53.64 kJ/mol
refractive_index
Index of refraction = 1.439 at 25 u00b0C
other_experimental_properties
Commercial dipropylene glycol is composed of 3 isomers (2,2'-dihydroxydiisopropropylether, 2,2'-dihydroxydipropylether and 2-hydroxypropyl-2'-hydroxyisopropylether that have very similar value for relevant physical and environmental properties. This allows the commercial mixture to be evaluated as a discrete substance. (SRC)
GHS / SDS Safety
Danger
Irritant
Corrosive
- Not Classified
- H333: May be harmful if inhaled [Warning Acute toxicity, inhalation]
- Reported as not meeting GHS hazard criteria by 3317 of 3330 companies (only 0.4% companies provided GHS information). For more detailed information, please visit ECHA C&L website.
- H302: Harmful if swallowed [Warning Acute toxicity, oral]
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
Chemical Identity
| CAS Number | 25265-71-8 |
| IUPAC Name | 2-(1-hydroxypropan-2-yloxy)propan-1-ol;1-(2-hydroxypropoxy)propan-2-ol |
| InChI Key | BPRJQFIHEGORJE-UHFFFAOYSA-N |
| PubChem CID | 134692469 |
| INCI Name | DIPROPYLENE GLYCOL |
Synonyms & Trade Names
Full Description
Dipropylene Glycol (DPG) is a glycol ether compound that provides humectancy and solvency properties in industrial formulations. This liquid chemical serves critical functional roles in agriculture, mining, and pharmaceutical applications where moisture retention and solvent capabilities are required. With a molecular weight of 268.35 and density of 1.023 at 68°F, DPG offers reliable performance characteristics for technical applications across these specialized industries.