Propylene Glycol (PG)

Overview

Propylene glycol (1,2-propanediol) is a colorless, almost odorless, slightly viscous and hygroscopic liquid that mixes completely with water and most organic solvents. Its low volatility and good solvency make it one of the most widely used glycols in industry.

Also known as

PG; 1,2-Propanediol; Monopropylene glycol (MPG); 1,2-Propylene glycol

CAS number

57-55-6

Molecular formula

C3H8O2

Molecular weight

76.09

Specifications

Test items	Specifications
Appearance	Colorless transparent liquid
Content /%	≥99.5
Water content /%	≤0.2
Acid value /(mgKOH/g)	≤0.5
Color (APHA, Pt-Co)	≤10
Fe content /(mg/kg)	≤0.1
Density /(g/cm³)	1.036-1.040

Applications

• Raw material for unsaturated polyester resins and polyether polyols
• Antifreeze, de-icing fluids and heat-transfer fluids
• Humectant, solvent and coupling agent in coatings, inks and cleaning products
• Moisture-retaining agent and plasticizer in other industrial formulations

Packaging

215 kg/drum; 1000 kg/IBC; ISO tank on request.

Storage

Store in tightly closed containers in a cool, dry and well-ventilated place. Propylene glycol is hygroscopic, so keep containers sealed.