The synthetic dyestuffs : and the intermediate products from which they are derived (1905)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872-1940 · London : C. Griffen and Co. · leaf 279
S N(CH3)2 + 2H20 S03 I (thiosulphonic acid of an indamine). 260 SYNTHETIC DYESTUFFS. … + H2S04 ^ V ^N(CH3)2C1 (Methylene blue). This substance, formulated as an o-quinone derivative containing tetravalentoxygen, would be (CH3)2N
Dyes and dyeing
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