Cain, John Cannell, 1871-1921 · London : Macmillan · leaf 72
AZO-COLOURS 59 carbonate in 400 litres of water. The dye is salted out of the dark violet solution and, after some time, it is filtered off and dried (Farbenfabriken vorm. F. Bayer & Co., E.P. 1 4424s5 ; F.P. 173042; G.P. 38802; U.S.P. 357273). Brilliant azurine 5G (By, A, L). OH OH OCH3 OCH3 OH OH… … A solution of 31-7 kilos, of dianisidine hydrochloride in about thirty times its quantity of water is treated with 40 kilos, of concentrated hydrochloric acid and then a solution of 14 kilos, of sodium nitrite in 70 litres of water is added. To this diazo- solution a solution of 60 kilos, of sodium…
Dyes and dyeing
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