| PROPYLENE GLYCOL | ||
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PRODUCT IDENTIFICATION |
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| CAS NO. | 57-55-6 |
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| EINECS NO. | 200-338-0 | |
| FORMULA | CH3CHOHCH2OH | |
| MOL WT. | 76.10 | |
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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; | ||
| DERIVATION | Propylene Oxide | |
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CLASSIFICATION |
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PHYSICAL AND CHEMICAL PROPERTIES |
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| PHYSICAL STATE |
Clear liquid |
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| MELTING POINT | - 59 C | |
| BOILING POINT | 185 - 189 C | |
| SPECIFIC GRAVITY | 1.036 |
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| SOLUBILITY IN WATER | Miscible | |
| pH | ||
| VAPOR DENSITY | 2.6 | |
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AUTOIGNITION |
510 C |
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NFPA RATINGS |
Health: 0; Flammability: 1; Reactivity: 0 | |
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REFRACTIVE INDEX |
1.4310 - 1.4340 |
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| FLASH POINT | 130 C | |
| STABILITY | Stable under ordinary conditions. | |
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GENERAL DESCRIPTION & APPLICATIONS |
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| 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 | ||
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INDUSTRIAL GRADE |
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APPEARANCE |
Clear liquid |
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ASSAY |
99.0% min |
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| WATER |
0.2% max |
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| COLOR |
10max (Pt/Co Scale) |
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SPECIFIC GRAVITY |
1.035 - 1.037 |
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DISTILL RANGE |
185 C (IBP) - 190 C (DP) |
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REFRACTIVE INDEX |
1.4310 - 1.4340 |
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RESIDUE ON IGNITION |
0.005% max |
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CHLORIDES |
1ppm max |
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ARSENIC |
1ppm max |
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HEAVY METALS |
5ppm max |
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IRON |
1ppm max |
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SULFATE |
0.006% max |
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USP GRADE |
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APPEARANCE |
Clear liquid |
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ASSAY |
99.7% MIN |
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| WATER |
0.2% max |
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| COLOR |
10max (Pt/Co Scale) |
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SPECIFIC GRAVITY |
1.035 - 1.037 |
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DISTILL RANGE |
185 C (IBP) - 189 C (DP) |
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REFRACTIVE INDEX |
1.4310 - 1.4320 |
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RESIDUE ON IGNITION |
0.0035% max |
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CHLORIDES |
1ppm max |
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ARSENIC |
1ppm max |
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HEAVY METALS |
5ppm max |
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IRON |
0.5ppm max |
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SULFATE |
100ppm max |
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TRANSPORTATION |
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| PACKING | 210kgs in drum | |
| HAZARD CLASS | Not regulated | |
| UN NO. |
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| OTHER INFORMATION | ||
| Hazard Symbols: n/a, Risk Phrases: n/a, Safety Phrases: 24/25 | ||
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