Propylene glycol
Chemical Name：Propylene glycol
CAS No.: 57-55-6
Appearance: Viscous Liquid
Molecular Formula: C3H8O2
Molecular weight: 76.09
Sample: Available
1,2-Propanediol (propylene glycol, CAS 57-55-6) industrial product purity ≥ 99.5%, colorless viscous liquid almost tasteless with slight sweet smell. Melting point -59℃, boiling point 187℃. Vapor pressure 0.011kPa (20℃), relative density 1.036 (20℃). Solubility in water miscible in all proportions (25℃), miscible with most organic solvents. Stable, incompatible with strong oxidants.
Parameters
| Parameter | Value |
| Melting point | -60 °C (lit.) |
| Boiling point | 187 °C (lit.) |
| density | 1.036 g/mL at 25 °C (lit.) |
| vapor density | 2.62 (vs air) |
| vapor pressure | 0.08 mm Hg ( 20 °C) |
| refractive index | n20/D 1.432(lit.) |
| FEMA | 2940 | PROPYLENE GLYCOL |
| Fp | 225 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) |
| pka | 14.49±0.20(Predicted) |
| form | Viscous Liquid |
| color | APHA: ≤10 |
| Specific Gravity | 1.038 (20/20℃)1.036～1.040 |
| PH | 6-8 (100g/l, H2O, 20℃) |
| Odor | at 100.00 %. odorless very slight alcoholic |
| Odor Type | odorless |
| Optical Rotation | -0.11° (C=1.00g/100ml, CHCL3) |
| biological source | synthetic |
| explosive limit | 2.4-17.4%(V) |
| Water Solubility | miscible |
| Sensitive | Hygroscopic |
| Merck | 14,7855 |
| JECFA Number | 925 |
| BRN | 1340498 |
| Dielectric constant | 32.0 |
| InChIKey | DNIAPMSPPWPWGF-UHFFFAOYSA-N |
| LogP | -0.92 |
| Surface tension | 35.44mN/m at 298.15K |
| CAS DataBase Reference | 57-55-6(CAS DataBase Reference) |
| NIST Chemistry Reference | Propylene glycol(57-55-6) |
| EPA Substance Registry System | Propylene glycol (57-55-6) |
Safety Information
| Item | Details |
| Safety Statements | 24/25 |
| WGK Germany | 1 |
| RTECS | TY2000000 |
| Autoignition Temperature | 779 °F |
| TSCA | Yes |
| HS Code | 29053200 |
| Hazardous Substances Data | 57-55-6(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 19400 – 36000 mg/kg LD50 dermal Rabbit 20800 mg/kg |
Product Application
Product Application of Propylene glycol CAS#57-55-6
Propylene glycol is used for similar applications as other glycols. It is an important raw material for unsaturated polyester, epoxy resin, and polyurethane resin. About 45% of total propylene glycol consumption goes into this field. Such unsaturated polyester is widely used in reinforced plastics and surface coatings. Thanks to good viscosity, hygroscopicity and non-toxicity, propylene glycol is widely used as moisture absorbent, antifreeze, lubricant and solvent in food, pharmaceutical and cosmetic industries.
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