Propylene glycol is a synthetic, water-miscible alcohol first produced commercially in the early 20th century as a safer alternative to ethylene glycol. It gained rapid acceptance in industries due to its low toxicity and excellent solvent and humectant properties. Over time, it became widely used in pharmaceuticals for drug formulation and stabilization. Its applications expanded into cosmetics, food processing, and industrial products because of its versatility. Today, propylene glycol remains an essential ingredient across multiple sectors, valued for its safety, stability, and functional efficiency.
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