Propylene Glycol PG USP 99.9% [CAS #: 57-55-6]
A pharmaceutical-grade high-quality PG (Propylene Glycol). Also, it is called Methylethylene Glycol, or 1,2-Dihydroxypropane, or Propane-1,2-Diol (IUPAC Name).
Propylene Glycol comes in a viscous liquid form. Its colorless, odorless, non-allergenic, and has a slightly bitter taste with a subtle mild sweetness.
Compared to vegetable glycerin, the viscosity of PG is lesser. Also, its considered as one of the main components of the e-liquid products. Basically, It turns into vapor when heated to produce a light (less thick) vapor with a bit harsher throat hit to the user compared with glycerin. On the other hand, Propylene Glycol is a fantastic flavor solvent and carrier and is 4 to 6 times more potent flavor carrier than glycerin.
In General, hereunder are some of the PG common uses:
An emulsifier in cosmetic and pharmaceutical creams
A solvent in elixirs and other liquid medications
Flavoring carrier, diluent, and solvent in electronic liquids industry
Coupling agent and solvent in sunscreens, lotions, shampoos, shaving creams, etc.
Humectant, preservative, and stabilizer in pet food, bakery goods, salad dressings, and other food flavorings
A solvent for flavorings and dyes in toothpaste and mouthwashes
Plasticizer for hair sprays, hand sanitizers, and moisturizing creams
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