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Home > Encyclopedia > 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(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2)

Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2) structure

Benzenesulfonic acid, 2,2′-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl-4,1-phenyleneimino)]bis[5-nitro-, sodium salt (1:2) 

structure
  • CAS No:

    71799-43-4

  • Formula:

    C30H22N8O12S2.2Na

  • 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)

  • 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

  • Categories:

    Dyes and Pigments  >  Dye

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

Characteristics

336.76000

10.39440

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

Methods of 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.

Uses

Acid brown is used for dyeing and printing wool and nylon, resulting in reddish brown.

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