SYNONYMS: Methylethyl glycol; Methylethylene glycol; 1,2-Propanediol; alpha-Propylene glycol; Methyl glycol; Monopropylene glycol; PG; 1,2- Dihydroxypropane; 1,2-Propylene Glycol; 2-Hydroxypropanol; 2,3-Propanediol; Propane-1,2- diol; Trimethyl glycol; 1,2-Propylenglykol; Isopropylene glycol

CAS NO.: 57-55-6

EINECS NO.: 200-338-0

FORMULA: CH₃CHOHCH₂OH

MOL WT.: 76.10

H.S. CODE: 2905.39

PHYSICAL STATE: clear liquid

MELTING POINT: -59 centigrade

BOILING POINT: 185-189 centigrade

SPECIFIC GRAVITY: 1.036

SOLUBILITY IN WATER: miscible

VAPOR DENSITY: 2.6

AUTOIGNITION: 510 centigrade

REFRACTIVE INDEX: 1.4310-1.4340

NFPA RATINGS: Health: 0 Flammability: 1 Reactivity: 0

FLASH POINT: 130 centigrade

STABILITY: Stable under ordinary conditions

PURITY: 99% min

APPLICATIONS: Large amount of propylene glycol is used in the plastics industry for the manufacture of polyester fibers and alkyd resins. It is used as a main ingredient in automobile antifreeze and engine-cooling liquids and in brake and hydraulic fluids due to its useful properties of low freezing point, involatility and low corrosive activity. It is used in the preparation of body-care surfactants. Propylene glycol is replacing ethylene glycol and ethanol as it is less toxic than ethylene glycol. Propylene glycol  is described as a "generally recognized as safe for use in food, cosmetics, and medicines" by FDA.  Propylene glycol USP grade is used as a non-toxic antifreeze in breweries and dairies. It is used as a humectant in foods and cosmetics. It is used as a solvent for colouring or flavouring agents as well as in many oral, injectable or topical pharmaceuticals. Its antibacterial property is applied in the preparation of sanitizing lotions.