A Brief Introduction to Propylene Glycol
Molecular Formula：C3H8O2
Molecular Weight: 76.09
CAS No.:57-55-6
Appearance:Colorless, slightly sweet, transparent viscous liquid
What is Propylene Glycol?
Propylene Glycol, also known as 1,2-propanediol, is a colorless, slightly sweet, transparent, viscous liquid. It is a component used in the manufacture of food, cosmetics, pharmaceuticals, unsaturated polyester resins, and antifreeze, and is widely recognized as a safe chemical raw material.
Why choose Highassay?
Highassay, as a Propylene Glycol trading intermediary from China, sells various grades of Propylene Glycol raw materials. Highassay has long-term, stable suppliers. Our partners continuously improve their technology, resulting in Propylene Glycol with a purity of over 99.8% and low impurities, providing greater stability to your finished products. Furthermore, we utilize high-end imported gas chromatographs and other equipment to ensure the accuracy of product specifications, giving Highassay’s Propylene Glycol better hygroscopic and antifreeze properties. If you are looking for Propylene Glycol raw materials that meet your needs, please contact us.
Applications of Propylene Glycol
Highassay adheres to strict quality control (QC) to produce Propylene Glycol. Buy Propylene Glycol in bulk from us now to get competitive market prices.
Pharmaceutical-grade Propylene GlycolIt has the highest requirements for purity and impurities among all grades and is also the most expensive. It is commonly used as a drug solvent or excipient for injections. Propylene Glycol is miscible with many solvents such as water and alcohol, allowing drugs that would otherwise be impossible to liquidize to be formulated into oral solutions or injections, and effectively improving the stability of formulations. Highassay provides USP-compliant Propylene Glycol solutions, ensuring the production of high-quality products for you.
Food-grade Propylene GlycolPropylene Glycol is a food additive certified by the FDA. The European food additive code E1520 for Propylene Glycol also confirms its safety.Propylene Glycol is not only a humectant, solvent, and preservative in food and tobacco products, but also, along with vegetable glycerin, a major component of the “electronic liquid” in e-cigarettes. Propylene Glycol can also be used in the production of animal feed or added as a food additive to baked goods, liquid beverages, processed meats, and confectionery.
Cosmetic-grade Propylene GlycolAs an ingredient with super hygroscopic, moisturizing, solubilizing and preservative properties, it is added to various daily chemical products such as moisturizing creams and body lotions. When used on the skin, Propylene Glycol can not only moisturize the skin for a long time and improve the skin condition, but also help improve the stability of cosmetic formulas and extend the shelf life of products.Propylene Glycol can not only help hair retain moisture and reduce hair quality problems, but also help the nutrients in shampoo and conditioner penetrate the hair shaft more quickly, enhancing hair’s suppleness.
Industrial-grade Propylene Glycol
It has the lowest requirements for purity and impurities among all grades, and is also cheaper. It is commonly used as a major component of antifreeze, coolant, and aircraft de-icing agents. The most important reason why Propylene Glycol has replaced ethylene glycol (highly toxic) and glycerin (highly viscous) as the mainstream is that it is safer and more environmentally friendly to humans. Secondly, because Propylene Glycol, after being thoroughly mixed with water, can lower the freezing point and raise the boiling point, it better protects the engine.
In addition to the above functions, Propylene Glycol can also be used as an important raw material for products such as unsaturated polyesters, epoxy resins, plasticizers, and surfactants. This unsaturated polyester is widely used in surface coatings and reinforced plastics.
Benefits of Propylene Glycol
Propylene Glycol is very common in our lives and has a wide range of uses. It has very low toxicity and irritation. In decades of use, there have been no cases of serious harm or carcinogenic risk. It is almost impossible to reach toxic levels in daily life unless there is improper intravenous injection or accidental ingestion of large amounts of Propylene Glycol by a child.Propylene Glycol is safe to add to cosmetics as long as the dosage is within the applicable range. When used as a moisturizer, its function and appearance are similar to glycerin.Besides its moisturizing properties, Propylene Glycol can also accelerate the penetration of active ingredients in cosmetics into the skin, improving absorption and utilization. Different applications require the selection of appropriate Propylene Glycol grades. Industrial-grade Propylene Glycol must never be used in daily chemical products, food, or pharmaceuticals to prevent safety issues.
Packaging and storage of Propylene Glycol
- Packaging in galvanized iron drums or plastic drums, available in sizes of 25kg, 200kg, and 215kg.
- Packaging can be in ISO tanks, liquid bags, or according to customer requirements.
- Store in a dry, cool place away from light.
Specification of Propylene Glycol
- Specification of Propylene Glycol
- Specification of Propylene Glycol
| Product Name | Propylene Glycol |
| Melting Point | -60℃ |
| Boiling Point | 184.8℃ |
| Water Soluble | Soluble |
| Density | 1.0381g/cm³ |
| Flash Point | 107.2℃ |
| Toxicity | Low toxicity |
| Package | Plastic bucket packaging |
| Storage | Sealed, moisture-proof, at room temperature, and away from incompatible substances. |
| Items | Standards | Results |
| Color(APHA) | 10ppm max | <10 |
| Identification | IR | |
| Specific gravity | 1.035-1.037 | 1.036 |
| Refractive indes | 1.4307-1.4317 | 1.431 |
| Distillation range (L) ℃ | 184.0-189.0 | 184 |
| Distillation range (U) ℃ | 184.0-189.0 | 189 |
| Distillation volume | 95% min | 97.20% |
| Acidity | Not more than 0.20ml of 0.10N sodium hydroxide is required | 0.1 |
| Water | 0.2% max | 0.09% |
| Residue on ignition | 0.07% max | 0.00% |
| Chloride | 0.007% max | <0.007% |
| Sulfate | 0.006% max | <0.006% |
| Heavy metals | 5ppm max | <5ppm |
| Assay | 99.5% min | 99.93% |
| Organic volatile impurity | A.Chloroform: 60ppm Max B. 1,4-dioxane: 380ppm Max C. Methylene chloride: 600ppm Max D.Trichloroethylene:80ppm Max | N.D N.D N.D N.D |
| Conclusion | Complying with USP |
Propylene Glycol is not Alginate, but it is a derivative of Alginate. Propylene Glycol Alginate is derived from Alginic acid found in brown algae and differs significantly from Propylene Glycol in structure and function.
It has not been banned in Europe, but the regulations on the use of Propylene Glycol are more stringent to ensure that the products used by consumers are safe.
The main components of e-cigarette liquid are vegetable Glycerin and Propylene Glycol. In terms of safety, e-cigarettes contain far fewer harmful substances than traditional cigarettes, but long-term use is still unhealthy.
About Propylene Glycol
- To ensure safe use, please determine if you are allergic to Propylene Glycol before use. Common allergic reactions to Propylene Glycol include skin allergies (erythema, itching, etc.); respiratory reactions (difficulty breathing, mucosal irritation, etc.); and digestive system reactions (nausea, diarrhea, etc.). In rare cases, severe reactions may occur, such as shock, difficulty breathing, or confusion.
- Propylene Glycol, as an important auxiliary ingredient in Propylene Glycol eye drops, not only helps dissolve the active ingredients in the eye drops to exert their medicinal effects, but also keeps our eyes moist and comfortable.
- Propylene Glycol, as a common diol, is most notably safe. Under veterinary advice, it can be used in some ear drops, ointments, or certain oral medications for dogs. However, Propylene Glycol is highly toxic to cats and its use is prohibited.
- Highassay provides you with the most complete and up-to-date MSDS for Propylene Glycol. Our quality is your guarantee of product’s quality; please purchase with confidence. Choose Highassay for your Propylene Glycol needs!
