DIPROPYLENE GLYCOL REGULAR - DOW

Dipropylene Glycol (DPG), Regular Grade, is a co-product from the manufacture of monopropylene glycol, involving the high temperature and high pressure hydrolysis of propylene oxide (PO) with excess water. Dipropylene glycol regular grade is a distilled product of greater than 99% purity (as DPG). The colorless, practically odorless, water soluble, medium viscosity and hygroscopic liquid with low vapor pressure and low toxicity, is a mixture of structural isomers

Chemical Name: Dipropylene Glycol

CAS Number: 25265-71-8

Chemical Family: Diols, Glycols, Polyols

Technical Data SheetSafety Data Sheet
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Identification & Functionality

Chemical Family
Diols,
Glycols,
Polyols
Chemical Name
Dipropylene Glycol
Tilley Product Number
10154-03
Molecular formula
C₆H₁₄O₃
Technologies
Base Chemicals & Intermediates
Product Families
Base Chemicals & Intermediates — Monomers & Oligomers
Diols & Polyols

Applications & Uses

Application Information
  • DIPROPYLENE GLYCOL REGULAR - DOW is used as a solvent, coupling agent and chemical intermediate. Typical applications include:
    • Esterification with benzoic acid to make dipropylene glycol dibenzoate for plasticizers.
    • A reactant in unsaturated polyester resins to add flexibility and hydrolytic stability to the finished resin.
    • Esterification with acrylic acid to make dipropylene glycol diacrylate for radiation cured resin formulations.
    • In dicyclopentadiene-based unsaturated polyester resin systems to add flexibility.
    • An initiator for urethane polyol synthesis using epoxides, and for the polyol in rigid polyurethane foams.
  • Dipropylene Glycol’s excellent solvency for certain oils, low evaporation rate and low toxicity lend its use in brake fluid formulations, cuttings oils, textile lubricants, printing inks, coatings, industrial soaps and as a solvent for agricultural and insecticidal formulations.

Properties

Specifications
ValueUnitsTest Method / Conditions
Molecular Weight134.2g/mol-
Distillation Range (at 101.3 kPa)228 - 236°C-
Vapor Pressure (at 25°C)0.0021kPa-
Freezing PointSuper cools--
Pour Point-39°C-
Density (at 25°C)1.022g/cm³-
Density (at 60°C)0.998g/cm³-
Refractive Index (at 20°C)1.439 - 1.442--
Viscosity (at 25°C)75Centipoise-
Viscosity (at 60°C)10.9Centipoise-
Specific Heat (at 25°C)2.18J/(g°K)-
Surface Tension (at 25°C)35mN/m (dynes/cm)-
Flash Point124°CPensky-Martens Closed Cup
Thermal Conductivity (at 25°C)0.1672W/(m°K)
Electrical Conducitivity (at 25°C)max. 6micro S/m
Heat of Formation-628kJ/mol-
Heat of Vaporization (at 25°C)45.4kJ/mol-
Assay¹min. 99.00wt. %DOWM 100761, calculated
Acidity (as Acetic Acid)max. 0.0050wt. %DOWM 101370
ChloridesMax. 5ppmDOWM 101867
Colormax. 10-ASTM D5386
Residue on Ignition (Based on Statistical Quality Control)max. 0.0050wt. %ASTM D1119, Pt-Co
Water Contentmax. 0.100wt. %ASTM E1064

Storage & Handling

Shelf Life
12 months
Storage Information
  • DIPROPYLENE GLYCOL REGULAR - DOW is for technical applications only.
  • DIPROPYLENE GLYCOL REGULAR - DOW is stable for at least one year when stored at ambient temperatures in closed containers and away from sunlight and other sources of UV light.
  • Where product heating is utilized (i.e. for bulk storage and/or transport containers) the product temperature should be controlled to prevent unintentional overheating over extended periods as this may potentially lead to accelerated oxidative degradation of the product.
  • As a general guide Dow recommends heating up to not more than 40° C.