Di Propylene Glycol

Cas Number


Other Names



The formula



Dipropylene glycol is a mixture of three isomeric chemical compounds, 4-oxa-2,6-heptandiol, 2-(2-hydroxy-propoxy)-propan-1-ol, and 2-(2-hydroxy-1-methyl-ethoxy)-propan-1-ol. It is a colorless, nearly odorless liquid with a high boiling point and low toxicity

Physical and Chemical Properties
Physical state and appearance Liquid. (Slightly Viscous liquid.)
Odor Odorless
Molecular Weight 134.18 g/mole
Color Colorless
Boiling Point 231.9°C (449.4°F)
Flash point 121.11°C (250°F)
Specific Gravity 1.0252 (Water = 1)
Vapor Pressure >0 kPa (@ 20°C)
Vapor Density 4.63 (Air = 1)
Dispersion Properties See solubility in water, methanol, diethyl ether
Solubility Miscible in cold water, hot water, methanol, diethyl ether
Propylene Glycol 0.20 weight %
DPG Isomer A 31.22 weight %
DPG Isomer B 51.62 weight %
DPG Isomer B' 8.92 weight %
DPG Isomer C 8.13 weight %
Chlorides as Cl 1 ppm
Color, Pt-Co 10 APHA Color

1. Dipropylene glycol finds many uses as a plasticizer, an intermediate in industrial chemical reactions, as a polymerization initiator or monomer, and as a solvent

2. Its low toxicity and solvent properties make it an ideal additive for perfumes and skin and hair care products

3. Dipropylene glycol is used primarily as an industrial intermediate, but is also used as asubstance in consumer products, and as an ingredient in pesticidal formulations

4. Uses of dipropylene glycol as a substance capitalize on its superior performance as a plasticizer as well as properties (e.g., high solvency, high viscosity)