4-Pentyn-1-ol (CAS 5390-04-5) is an alkyne alcohol with the molecular formula C5H8O and a molecular weight of 84.12 g/mol. It is also known as Pent-4-yn-1-ol, 4-Pentyne-1-ol, or 1-Pentyn-5-ol. 4-Pentyn-1-ol is commonly used as an initiator in ring-opening polymerization reactions and as a starting reagent in the stereoselective total synthesis of various organic compounds.

4 pentyn 1 ol

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4-Pentyn-1-ol Uses


4-Pentyn-1-ol (CAS 5390-04-5) is a versatile alkyne alcohol with a molecular formula of C5H8O and a molecular weight of 84.12 g/mol. It’s also known as Pent-4-yn-1-ol, 4-Pentyne-1-ol, or 1-Pentyn-5-ol, and has a wide range of uses in the field of organic synthesis.

Chemical Appearance:

Clear colorless to yellow liquid


In polymerization, 4-pentyn-1-ol is a catalyst to open ring structures and form polymers. The reagent is used to initiate the radical polymerization of vinyl monomers such as acrylates and methacrylates. The polymer produced is used in various applications such as coatings, adhesives, and other specialties.

 In organic synthesis, 4-pentyn-1-ol is used as a starting material for the stereoselective synthesis of various compounds. Its reactivity and stereoselectivity make it ideal for the synthesis of optically active compounds and for the synthesis of chiral compounds. It is also used to construct cyclic structures such as cyclopentane, cyclohexanes, and spirocycles.

4-Pentyn-1-ol Properties

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Clear colorless to yellow liquid



Storage conditions:

Store at low temperature and avoid light.

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