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amino-R acid

amino-R acid structure

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

MDL Number:: MFCD00065332

MOL File:: 92-28-4.mol

Last updated:2025-12-31 14:38:37

Product description	Number	Pack Size	Price
2-NAPHTHYLAMINE-3,6-DISULFONIC ACID 97.00%	CHM0291212	1G	$1083.39
2-NAPHTHYLAMINE-3,6-DISULFONIC ACID 97.00%	CHM0291212	2.5KG	$6675.9
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amino-R acid Properties

Density	1.769±0.06 g/cm3(Predicted)
pka	-0.93±0.40(Predicted)
FDA UNII	6QL4K5946T
EPA Substance Registry System	2,7-Naphthalenedisulfonic acid, 3-amino- (92-28-4)

SAFETY

Risk and Safety Statements

RIDADR	1759
TSCA	TSCA listed
HazardClass	8
PackingGroup	III

amino-R acid price

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
American Custom Chemicals Corporation	CHM0291212	2-NAPHTHYLAMINE-3,6-DISULFONIC ACID 97.00%	92-28-4	1G	$1083.39	2021-12-16	Buy
American Custom Chemicals Corporation	CHM0291212	2-NAPHTHYLAMINE-3,6-DISULFONIC ACID 97.00%	92-28-4	2.5KG	$6675.9	2021-12-16	Buy

Product number	Packaging	Price	Buy
CHM0291212	1G	$1083.39	Buy
CHM0291212	2.5KG	$6675.9	Buy

amino-R acid Chemical Properties,Uses,Production

Uses

Manufacture of dyes.

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℃.

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( 2)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Shaanxi DIDU pharmaceutical and Chemical Co., Ltd	029-029-81120477 17792793610	1033@dideu.com	China	10000	58

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

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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