Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2)
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Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2)
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CAS No:
71799-43-4
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Formula:
C30H22N8O12S2.2Na
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Chemical Name:
Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2)
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Synonyms:
Benzenesulfonic acid,2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-,sodium salt (1:2);Benzenesulfonic acid,2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(azo-4,1-phenyleneimino)]bis[5-nitro-,disodium salt;C.I. 20177;C.I. Acid Brown 354;Colocid Brown H 3R;Derma Red Brown RO;Acid Deep Brown R;Kemacid Brown 354;Coriamin Brown EBR
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CAS No:
Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2) Basic Attributes
794.63574
794.04400
276-027-9
Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2) Use and Manufacturing
Using resorcinol, 2-chloro-5-nitrobenzenesulfonic acid and p-aminoacetanilide as raw materials, firstly condense 2-chloro-5-nitrobenzenesulfonic acid with p-aminoacetanilide and hydrolyze to obtain Intermediate 4-nitro-4'-aminodiphenylamine-2-sulfonic acid. Finally, 2 mol of the intermediate is diazotized and 1 mol of resorcinol is coupled to obtain the product. The finished product is obtained by salting out, filtering, drying and crushing.
Acid brown is used for dyeing and printing wool and nylon, resulting in reddish brown.
Latest News on Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2)
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