Formaldehyde, reaction products with sulfonated 1,1-oxybis(methylbenzene) and 4,4-sulfonylbis(phenol), sodium salts, coupled with diazotized 4-nitrobenzenamine
Formaldehyde, reaction products with sulfonated 1,1-oxybis(methylbenzene) and 4,4-sulfonylbis(phenol), sodium salts, coupled with diazotized 4-nitrobenzenamine