abstract |
(57) [Summary] [Purpose] To improve biodegradability, desilvering property, bleaching fog, and fog due to contamination. Consists of a metal chelate compound such as Fe (III) of the formula compound. (R 1 is hydrogen or -L 3 -A 3 , L 1 , L 2 and L 3 are alkylene groups and the like, A 1 , A 2 and A 3 represents a carboxy group and the like, and W represents an alkylene group having 2 to 8 carbon atoms in the straight chain portion. ) [Chemical 1] |