PROPYLENE GLYCOL

PRODUCT IDENTIFICATION

CAS NO. 57-55-6

PROPYLENE GLYCOL

EINECS NO. 200-338-0
FORMULA CH3CHOHCH2OH
MOL WT. 76.10

H.S. CODE

2905.39
TOXICITY Oral rat LD50: 20000 mg/kg
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;

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

Clear liquid

MELTING POINT - 59 C
BOILING POINT 185 - 189 C
SPECIFIC GRAVITY

1.036

SOLUBILITY IN WATER Miscible
pH  
VAPOR DENSITY 2.6

AUTOIGNITION

510 C

NFPA RATINGS

Health: 0; Flammability: 1; Reactivity: 0

REFRACTIVE INDEX

1.4310 - 1.4340

FLASH POINT 130 C
STABILITY Stable under ordinary conditions.

GENERAL DESCRIPTION & APPLICATIONS

Glycol: any of a class of organic chemicals characterized by having separate two hydroxyl (-OH) groups, contribute to high water solubility, hygroscopicity and reactivity with many organic compounds, on usually linear and aliphatic carbon chain. The general formula is CnH2n(OH)2 or (CH2)n(OH)2. The wider meaning names include diols, dihydric alcohols, and dihydroxy alcohols. Polyethylene glycols and polypropylene glycols are sometimes called polyglycols which are derived by polymerization of ethylene oxide and propylene oxide respectively. Polyethylene glycols are water-soluble at all molecular weights, but polypropylene glycols become increasingly less water-soluble at high molecular weights. Mono-, di- and tripropylene glycol, the first three members of a homologous series of propylene glycol, are completely water and ethanol soluble; miscible with most organic solvents including acetone, chloroform and some essential oils; soluble in 12 parts of ether. Propylene glycol is an odorless and colorless liquid; boiling point 188 C, freezing point -39 C. Propylene glycol is prepared by hydrolysis of propylene oxide. 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.
SALES SPECIFICATION

INDUSTRIAL GRADE

APPEARANCE

Clear liquid

ASSAY

99.0% min

WATER

0.2% max

COLOR

10max (Pt/Co Scale)

SPECIFIC GRAVITY

1.035 -  1.037

DISTILL RANGE

185 C (IBP) - 190 C (DP)

REFRACTIVE INDEX

1.4310 - 1.4340

RESIDUE ON IGNITION

0.005% max

CHLORIDES

1ppm max

ARSENIC

1ppm max

HEAVY METALS

5ppm max

IRON

1ppm max

SULFATE

0.006% max

USP GRADE

APPEARANCE

Clear liquid

ASSAY

99.7% MIN

WATER

0.2% max

COLOR

10max (Pt/Co Scale)

SPECIFIC GRAVITY

1.035 -  1.037

DISTILL RANGE

185 C (IBP) - 189 C (DP)

REFRACTIVE INDEX

1.4310 - 1.4320

RESIDUE ON IGNITION

0.0035% max

CHLORIDES

1ppm max

ARSENIC

1ppm max

HEAVY METALS

5ppm max

IRON

0.5ppm max

SULFATE

100ppm max

TRANSPORTATION

PACKING 210kgs in drum
HAZARD CLASS Not regulated
UN NO.

 

OTHER INFORMATION
Hazard Symbols: n/a, Risk Phrases: n/a, Safety Phrases: 24/25
PRICE INFORMATION