3-Hexyne-2,5-diol

3-Hexyne-2,5-diol (CAS 3031-66-1, EC 221-209-5) is an acetylenic diol with the molecular formula C6H10O2, also referenced under the names 3-Hexyn-2,5-diol and NSC 409184. It carries no assigned E-code and is classified within the alcohols and glycols chemical family.

In polymer chemistry, the compound acts as a polymerization initiator, where its dual hydroxyl groups serve as reactive anchoring points for chain growth in specialty polymer systems. It also functions as a solvent and carrier in pharmaceutical formulation and metalworking fluid development, where its structural geometry supports controlled solvation of active ingredients or lubrication additives.

3-Hexyne-2,5-diol is supplied as an oil-phase liquid and is subject to REACH registration requirements for commercial quantities within the European Economic Area. Procurement teams should confirm available pack sizes and purity grades directly with the supplier, as specifications vary by application in pharmaceutical and industrial contexts.