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Propylene glycol is a colorless, odorless, and tasteless chemical compound. It is a type of alcohol that is used in a wide range of applications, including food, cosmetics, pharmaceuticals, and industrial products. In food, it is used as a humectant, a solvent, and an emulsifier to help mix ingredients and retain moisture. In cosmetics, it is used as a moisturizing agent. In industrial products, it is used as an antifreeze in heating and cooling systems, and as a solvent in the production of polymers, such as coatings and inks. Propylene glycol is generally considered to be safe for use in food and cosmetic products, although its long-term effects on human health are still being studied.
| Item | Index | |
| Premium | First Grade | |
| Chroma(pt-co)no ≤ | 10 | 16 |
| Content%≥ | 99.7 | 99.5 |
| Density(20oc G/cm³) | 1.037-1.039 | 1.036-1.039 |
| Refractive Index（nd20） | 1.43-1.434 | 1.43-1.435 |
| Water Content %≤ | 0.1 | 0.2 |
| Alkalinity(calculated by Oh-) Mmol/100g≤ | 0.04 | 0.05 |
| Boiling Range(≥95%）oc | 184-188 | 183-189 |
| Ash Content | 0.01 | 0.012 |
| Appearance | Transparent Viscous Liquid Without Mechanical Impurities |
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