English name 2: polyvinyl alcohol (viny) polymer, referred to as poval, PVA.

CAS number: 9002-89-5

Molecular formula: [C2H4O]n

At present, medical PVA has specifications such as PVA05-88, PVAl7-88 and PVA- 124. The alcoholysis degree of the first two specifications is (88 2) (m 01)%, and the average polymerization degree (n) is 500-600 and 1700 respectively. Degree of alcoholysis of polyvinyl alcohol. 124 is 98-99 (m01)%, and the average degree of polymerization (n) is n) 2 400-2 500.

It is one of the strategic tasks for China's traditional Chinese medicine to develop new pharmaceutical excipients and promote the optimization of dosage forms. PVA has the characteristics of convenient synthesis, safety and low toxicity, easy control of product quality, low price and convenient use. Therefore, PVA is an excellent pharmaceutical excipient with redevelopment potential.

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