Benzenesulfonic acid, 2-methyl-5-nitro-, alk. cond. products, reduced

Preparation

the reducing agent with organic (such as glycerin or glucose) processing C.I. Direct Yellow 11 (C.I. 40000) solution; Or in the presence of the reducing agent, in sodium hydroxide medium condensation 2-Methyl-5-nitrobenzenesulfonie acid; Or in the presence of the reducing agent, in sodium hydroxide medium heating (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid (40002). Use the method processing C.I. Direct Yellow 11?(C.I. 40000) solution (40003).

Properties and Applications

orange to red light orange. Soluble in water for orange, soluble in soluble fiber element, slightly soluble in alcohol, insoluble in other organic solvents. The strong sulfuric acid for red light blue, yellow solution for olive diluted, there are gray light yellow precipitate; In nitric acid solution for yellow to olive. The dye solution to join 10% sulfuric acid as yellow brown, add thick sodium hydroxide solution becomes more red. Used for the cellulose fibre, silk dyeing, cellulose, silk, wool fabric printing, also can be used for leather and paper shading, its heavy metal salt can be used as organic pigments.