Abstract
The molding of soy sauce was already apparent at 8.5th day of the test with the use of 4-benzylresocinol in an approximate concentration of 0.01%. However, its monohalogen derivatives, 6-chloro-4-benzylresorcinol, at ca. 0.005%, and 4′-chloro- and 4′-bromo-2, 4-dihydroxydiphenylmethane, at ca. 0.007%, sucessfully inhibited the growth of mold in soy sauce during a 50-day test period. On the other hand, 2′-chloro-2, 4-dihydroxydiphenylmethane, at ca. 0.01% concentration, was not able to stop mold-growth after 42 days. In the dichloro derivatives, 5, 4′-dichloro-2, 4-dihydroxydiphenylmethane, in a concentration of ca. 0.003%, and 3′, 4′-dichloro-2, 4-dihydroxydiphenylmethane, at ca. 0.007%, were also able to inhibit mold-growth during a 50-day test period. From above results, it is seen that the halogen substitution strengthens antiseptic action although there is a good deal of difference according to the position of the halogens substituted.
