The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 288
g in water with a blue colour.Dyes cotton direct from an alkaline bath. Equations.—OOH3 <C>H2O^H, OCH3 (dianisidine). OCH, <_>N:N CI CI / N i N OCH3 + 2NaN02 + 4HCl OCH, / \lH : N ^ + 2NaCl + 4H20<^>N i N OCH^01 (tetrazodianisidine chloride). SO 3Na(^\QsOiOH NIL, Na OH NK,… … 18*4 grams benzidine. 50 „ y acid (amidonaphthol sulphonic acid y,NH2: OH : SQ3H = 2:8:6; mol. wt. 239). The benzidine is tetrazotised as in the preparation of Chrysamine G, and thesolution is added slowly to a cold solution of 50 grams of y acid in 60 grams ofsodium carbonate and 500 c.c. of…
Dyes and dyeing
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