Fierz-David, H. E. (Hans Eduard), 1882-1953 · New York, D. Van Nostrand · leaf 117
lied (first by the B.A.S.F.) to the preparation of the diazo com- pound of aminonaphthol sulphonic acid 1:2:4; on heating with sodium sulphite it yields naphthylamine disulphonic acid 1:2:4, together with some naphthionic acid ; the former can be diazotized and converted into the diazo compound of… … S03H
Dyes and dyeing
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