propylene12diol

Propylene12diol is not a standard chemical name and appears to be a misspelling or variant of 1,2-propanediol, commonly known as propylene glycol. In formal nomenclature, the IUPAC name is propan-1,2-diol. Its CAS number is 57-55-6, and it has the molecular formula C3H8O2 (molar mass 76.09 g/mol).

Propylene glycol is a colorless, viscous liquid with a mildly sweet odor. It is highly hygroscopic and highly soluble in water, as well as in many organic solvents. Typical physical properties include a density around 1.036 g/cm3 at 20°C, a melting point of about -59°C, and a boiling point near 188.2°C. It is miscible with water across all proportions.

Industrial production occurs mainly by hydration of propylene oxide, usually via catalytic processes. It is derived from propylene, a refinery byproduct, and is produced at large scale for use in various end markets.

Uses for propylene glycol are diverse. It serves as a humectant, solvent, or plasticizer in cosmetics, personal care products, foods (where permitted as a food additive), and pharmaceuticals. It is also employed as an antifreeze and heat-transfer fluid in some applications due to its low freezing point and chemical stability.

Safety and regulation: propylene glycol generally has low acute toxicity, but ingestion of large amounts can cause adverse effects, and exposure to high concentrations may cause irritation. It is subject to regulation for food, cosmetic, and pharmaceutical use in many countries. The compound is considered readily biodegradable and is regarded as having relatively low environmental persistence, though proper handling and disposal are recommended.

If referring to propylene12diol, it is likely intended to mean propylene glycol (1,2-propanediol). See also ethylene glycol and 1,3-propanediol.