a transparent, crystalline, water-soluble powder, C3H5NaO2, used in foodstuffs to prevent mold growth, and in medicine as a fungicide.
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British Dictionary definitions for sodium propionate
a transparent crystalline soluble substance used as a medical fungicide and to prevent the growth of moulds, esp to retard spoilage in packed foods. Formula: Na(C 2 H 5 COO)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012