amino-R acid

CAS No.: 92-28-4

Chemical Name:: amino-R acid

Synonyms: amino-R acid;Amido R acid;2-Aminonaphthalene-3,6-disulfonic acid;3-aminonaphthalene-2,7-disulfonic acid;3-aminonaphthalene-2,7-disulphonic acid;2-amino-3,6-naphthalenedisulphonic acid;3-azanylnaphthalene-2,7-disulfonic acid;2,7-Naphthalenedisulfonic acid, 3-amino-

CBNumber:: CB8875802

Molecular Formula:: C10H9NO6S2

Molecular Weight:: 303.31

MOL File:: 92-28-4.mol

Modify Date:: 2023/11/6 11:23:10

Request For Quotation

amino-R acid Properties

Density	1.769±0.06 g/cm3(Predicted)
pka	-0.93±0.40(Predicted)
EPA Substance Registry System	2,7-Naphthalenedisulfonic acid, 3-amino- (92-28-4)

SAFETY

Risk and Safety Statements

RIDADR	1759
HazardClass	8
PackingGroup	III

amino-R acid Chemical Properties,Uses,Production

Uses

Amino R acid is used mainly as an intermediate for conversion to 2-amino-3-hydroxynaphthalene-6-sulfonic acid by caustic fusion at 250℃.

Uses

Manufacture of dyes.

Production Methods

The sodium salt of 2-hydroxynaphthalene-3,6-disulfonic acid is aminated by heating with ammonia and ammonium bisulfite for 24 h at 160℃. The charge is added to excess lime and heated to remove excess ammonia, and calcium sulfite is filtered off. The productis precipitated by acidification ofthe filtrate and purified by redissolving the paste in alkali and reprecipitating with acid. The yield is 90 %.

amino-R acid Preparation Products And Raw materials

Raw materials

Ammonium bisulfite 3-Hydroxynaphthalene-2,7-disulphonic acid Ammonia

Preparation Products

BRILLIANT PURPURIN R C.I.Reactive Yellow 26 3-Amino-4-[[4'-[(2-amino-8-hydroxy-6-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt 2,7-Naphthalenedisulfonic acid, 3-amino-4-[[4'-[(4-ethoxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-, disodium salt 2,7-Naphthalenedisulfonic acid, 4,4'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-amino-, tetrasodium salt

Food Yellow 7 vital new red ACID ORANGE 45 3-Amino-4-[[4'-[(6-amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt 3-Amino-4-[[4'-[(4-ethoxyphenyl)azo]-1,1'-biphenyl-4-yl]azo]-2,7-naphthalenedisulfonic acid disodium salt

tetrasodium 4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-aminonaphthalene-2,7-disulphonate]

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amino-R acid Suppliers

Global( 3)Suppliers

Supplier	Tel	Country	ProdList	Advantage	Inquiry
Dynasty Colourants Co., Ltd.	86 0574 27862107 27862719	China	3306	51	Inquiry
Shaanxi DIDU pharmaceutical and Chemical Co., Ltd	15229059051	China	9976	58	Inquiry

Supplier	Advantage
Dynasty Colourants Co., Ltd.	51
Shaanxi DIDU pharmaceutical and Chemical Co., Ltd	58

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CHROMOTROPE 2R SULFONAZO III, TITRATION INDICATOR FOR S O4 3-AMINO-2,7-NAPHTHALENEDISULFONIC ACID MONOSODIUM SALT

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3-aminonaphthalene-2,7-disulphonic acid amino-R acid 3-aminonaphthalene-2,7-disulfonic acid Amido R acid 2,7-Naphthalenedisulfonic acid, 3-amino- 3-azanylnaphthalene-2,7-disulfonic acid 2-Aminonaphthalene-3,6-disulfonic acid 2-amino-3,6-naphthalenedisulphonic acid 92-28-4