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 258
N : N< >N : N + NaCl + NaHCO SO;H (Naphthol black B). Note.—The formula of this dye is always written as the tetrasodium salt,but if the acid potasdum salt of amido-G salt is used (this being stable in thepresence of hydrochloric acid), the dye should be, apparently, the potassiumtrisodium… … 15 grams ^9-amidoacetanilide. 24 „ amidonaphthol sulphonic acid y. 10 ,, resorcinol. 10 „ ??z-toluylenediamine. The amidoacetanilide is dissolved in water with the addition of 30 c.c. of con-centrated hydrochloric acid, the solution cooled with ice to 0-5°, and diazotisedby adding 7 2 grams of…
Dyes and dyeing
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