These are some of the ways propylene glycol is used:
• As a solvent in pharmaceuticals including oral, inject-able, and topical formulas.
• As a moisturizer in medicines, cosmetics, food, toothpaste, shampoo, conditioner, pet care products, mouth wash, hair dye, and tobacco products.
• As an ingredient in massage oils, fragrance oils, hand sanitizers, antibacterial lotions, and saline solutions.
• To make artificial smoke or fog theatrical productions and firefighter training.
• As a vaporizable base for diluting the nicotine liquid in electronic cigarettes.
• As a solvent for food colors and food flavorings.
• As a wetting agent to determine time needed for paints and coatings to dry.
• As a lubricant in air conditioning compressors.
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