POLYVINYL ALCOHOL
Prepared at the 68th JECFA (2007) and published in FAO JECFA Monographs 4 (2007), superseding specifications prepared at the 63rd JECFA (2004) and published in the Combined Compendium of Food Additive Specifications, FAO JECFA Monographs 1 (2005). An ADI of 50 mg/kg bw was established at 61st JECFA (2003).
SYNONYMS Vinyl alcohol polymer, PVOH, INS No. 1203
DEFINITION Polyvinyl alcohol is a synthetic resin prepared by the polymerization of vinyl acetate, followed by partial hydrolysis of the ester in the presence of an alkaline catalyst. The physical characteristics of the product depend on the degree of polymerization and the degree of hydrolysis.
Chemical names Ethenol homopolymer
C.A.S. number 9002-89-5
Chemical formula (C2H3OR)n where R=H or COCH3 (randomly distributed)
DESCRIPTION Odourless, translucent, white or cream-coloured granular powder.
FUNCTIONAL USES Coating, binder, sealing agent and surface-finishing agent.
