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2-Aminonaphthalene-7-sulfonic acid

2-Aminonaphthalene-7-sulfonic acid Structure
CAS No.
494-44-0
Chemical Name:
2-Aminonaphthalene-7-sulfonic acid
Synonyms
amino-F acid;2-Naphthylamine-7-sulfonic acid;2-Amino-7-naphthalenesulfonic acid;7-Amino-2-naphthalenesulfonic acid;7-aminonaphthalene-2-sulfonic acid;7-aminonaphthalene-2-sulphonic acid;7-azanylnaphthalene-2-sulfonic acid;2-Naphthalenesulfonic acid, 7-amino-
CBNumber:
CB7875340
Molecular Formula:
C10H9NO3S
Molecular Weight:
223.25
MOL File:
494-44-0.mol
Modify Date:
2023/11/3 13:26:31
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2-Aminonaphthalene-7-sulfonic acid Properties

Density 1.3588 (rough estimate)
refractive index 1.6500 (estimate)
pka -0.16±0.40(Predicted)
Water Solubility 0.2g/L(20 ºC)

2-Aminonaphthalene-7-sulfonic acid Chemical Properties,Uses,Production

Chemical Properties

2-Aminonaphthalene-7-sulfonic acid [494- 44-0].  (7-aminonaphthalene-2-sulfonic acid), amido F acid, C10H9NO3S, Mr 223.24, crystallizes as the monohydrate in needles or prisms although only 0.3 % soluble at 100℃. Bromination gives the 1-bromo derivative, caustic fusion results in 7-amino-2-naphthol, and sulfonation with oleum gives a mixture of disulfonic acids.

Production Methods

2-Hydroxynaphthalene-7-sulfonic acid is aminated by a Bucherer reaction under conditions similar to those used for Tobias acid.

2-Aminonaphthalene-7-sulfonic acid Preparation Products And Raw materials

Raw materials

7-hydroxynaphthalene-2-sulphonic acid

Preparation Products

C.I. Direct red 74 2-Naphthalenesulfonic acid, amino[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-, monosodium salt 2-Naphthalenesulfonic acid, 8,8'-[carbonylbis[imino(2-sulfo-4,1-phenylene)azo]]bis[7-(methylamino)-, tetrasodium salt 6-Amino-5-[[4'-[(2-amino-7-sulfo-1-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-2-naphthalenesulfonic acid disodium salt

2-Aminonaphthalene-7-sulfonic acid Suppliers

Global( 2)Suppliers
Supplier Tel Country ProdList Advantage Inquiry
Dynasty Colourants Co., Ltd. 86 0574 27862107 27862719 China 3306 51 Inquiry
Supplier Advantage
Dynasty Colourants Co., Ltd. 51
7-aminonaphthalene-2-sulphonic acid amino-F acid 7-aminonaphthalene-2-sulfonic acid 2-Naphthylamine-7-sulfonic acid 7-Amino-2-naphthalenesulfonic acid 2-Amino-7-naphthalenesulfonic acid 7-azanylnaphthalene-2-sulfonic acid 2-Naphthalenesulfonic acid, 7-amino- 494-44-0