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 273
ties.—The disodium salt is easily soluble in water, but difficultlysoluble in salt solution or hydrochloric acid. It is analysed by titration with half-normal nitrite solution. Use.—The chief use of the acid is for the preparation of amidonaphtholdisulphonic acid H and chromotropic acid (1:8-… … 27. Amidonaphthol disulphonic acid H.OH NH2 SOaHl^A^SOgHE.P. 13,44390; D.P. 69,72290. 50 grams a-naphthylamine trisulphonic acid (disodium salt) 1:3:6:8.100 „ powdered caustic soda. The caustic soda is dissolved with 10 c.c. of water in a nickel or coppercrucible, the protected thermometer being…
Dyes and dyeing
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