1,2-Propylene Glycol CAS NO.57-55-6 High quality 1,2-Propanediol
Products Description
- 1,2 Propylene glycol an intermediate of the bactericide difenoconazole and an important raw material for unsaturated polyester, epoxy resin, and polyurethane resin. The amount in this aspect accounts for about 45% of the total consumption of 1,2 propylene glycol. This unsaturated poly Ester is widely used in surface coatings and reinforced plastics. 1,2 Propylene glycol has good viscosity and hygroscopicity, and is non-toxic, so it is widely used as a moisture absorbent, antifreeze, lubricant and solvent in the food, medicine and cosmetic industries. In the food industry, it is mainly used as a food emulsifier; at the same time it is an excellent solvent for seasonings and pigments.
- The extraction process of 1,2 propylene glycol belongs to the technical field of chemical separation. This process utilizes the characteristics that mineral acid salts are easy to crystallize, while the organic acid salts in the propylene glycol fermentation broth are not easy to crystallize. An appropriate amount of inorganic acid is added to the propylene glycol fermentation broth to replace the organic acid salts in the fermentation broth with organic acids. The corresponding mineral acid salt is generated; the fermentation broth is concentrated, so that the mineral acid salt crystallizes, and is separated from the fermentation broth; the concentrated fermentation broth becomes propylene glycol, succinic acid, lactic acid, acetic acid, glycerol and 2,3-butane The mixture of alcohol, vacuum distillation of the mixture to obtain the products of each component. In the pharmaceutical industry,propylene glycol is often used as a solvent, softener and excipient for the manufacture of various ointments and ointments. Because of its good compatibility with various spices, it is also used as a solvent and softener for cosmetics.Propylene glycol is also used as a tobacco moisturizer, antifungal agent, food processing equipment lubricating oil and food marking ink solvent. An aqueous solution of propylene glycol is an effective antifreeze.
- Propylene glycol is a synthetic liquid substance that absorbs water. Propylene glycol is also used to make polyester compounds, and as a base for deicing solutions. Propylene glycol is used by the chemical, food, and pharmaceutical industries as an antifreeze when leakage might lead to contact with food. The Food and Drug Administration (FDA) has classified propylene glycol as an additive that is “generally recognized as safe” for use in food. It is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food colors and flavors, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions. Other names for propylene glycol are 1,2-dihydroxypropane, 1,2-propanediol, methyl glycol, and trimethyl glycol. Propylene glycol is clear, colorless, slightly syrupy liquid at room temperature. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Propylene glycol is practically odorless and tasteless.
Basic Analysis
| Items | Specifications |
| Appearance | Clear liquid |
| MPG Assay,wt.% | Min. 99.8 |
| Sp. Gr (25/25℃) | 1.035-1.037 |
| Color, APHA | Max.10 |
| Water ,ppm | Max.700 |
| Iron, ppm | Max.0.1 |
| Chlorides,wt,ppm | Max.1.0 |
| Sulfate ,wt,ppm | Max.10 |
| Heavy metals, ppm | Max.5 |
Application
- As a solvent, it can dissolve food additives that are insoluble in water such as preservatives, pigments, antioxidants, etc., and then add to food; it has strong hygroscopicity, and has moisturizing and anti-freezing effects on food.
- As a drug carrier and granular drug agent. It can be used as humectant, softener, solvent, etc.
- In the tobacco industry, it can be used as tobacco flavor, tobacco moisturizer, preservative, etc.
- In the food industry, it is used as a solvent for flavors, food coloring, food packaging softeners, and food anti-sticking agents.
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