1. Synonyms

PROPYLENEGLYCOL,REAGENT(ACS)PROPYLENEGLYCOL,REAGENT(ACS)PROPYLENEGLYCOL,REAGENT(ACS);Propyledneglycol;GlycerolImpurity3（GlycerolEPImpChemicalbookurityC）;Propyleneglycol57-55-6;PropyleneglycolManufacturer;1,2-PROPANEDIOL,GRACS99.5%;PROPYLENEGLYCOLTECHGRADE;PropyleneGlycol,Reagent

2. Usage

Propylene glycol is a colorless and odorless liquid that is used in a wide range of applications. Here are some of the common uses of propylene glycol:

1. Food and beverage: Propylene glycol is classified as a safe food additive by the U.S. Food and Drug Administration (FDA) and is commonly used in food and beverage products. It is used as a solvent, humectant, and preservative in a variety of foods such as soft drinks, ice cream, salad dressings, and baked goods.
2. Pharmaceuticals: Propylene glycol is also used in the pharmaceutical industry as an excipient, which is a substance added to a medication to improve its taste, texture, stability, or absorption. It can be found in oral, topical, and injectable medications.
3. Cosmetics and personal care products: Propylene glycol is commonly used in cosmetics and personal care products such as moisturizers, shampoos, and toothpaste. It acts as a solvent, humectant, and emollient, helping to retain moisture and improve the texture and stability of these products.
4. Industrial applications: Propylene glycol has various uses in industrial applications. It is used as an antifreeze and de-icing agent for aircraft, automobiles, and water-based heating systems. It is also used as a solvent in the production of paints, coatings, and printing inks. Additionally, propylene glycol is used as a heat transfer fluid and as a component in industrial cleaners and degreasers.
5. Electronic cigarettes and vaping: Propylene glycol is often one of the main ingredients in e-liquids used in electronic cigarettes and vaping devices. It helps to create the vapor when heated and provides a smoother sensation when inhaling.

It is important to note that while propylene glycol is generally recognized as safe for most individuals, it can cause allergic reactions or irritation in some people. It is always advisable to consult product labels and manufacturers' instructions for proper usage and precautions.