1-Amino-2-naphthol-4-sulfonic acid

1-Amino-2-naphthol-4-sulfonic acid Basic information

Product Name:	1-Amino-2-naphthol-4-sulfonic acid
Synonyms:	4-Amino-3-hydroxy-1-naphthalenesulfonic acid, ACS, 98+%;1-AMINO-2-NAPHTHOL-4-SULPHONIC ACID extrapure AR;3-Hydroxynaphthionic acid;4-Amino-3-hydroxy-1-naphthalenesulfonic acid,95%;4-amino-3-hydroxy-1-Naphthalenesulfonic acid 1-amino-2-naphthol-4-sulfonic acid 4-Amino-3-hydroxynaphthalene-1-sulfonic acid;4-Amino-3-hydroxy-1-naphthalenesulfonic acid,1-Amino-2-naphthol-4-sulfonic acid;4-Amino-3-hydroxy-1-naphthalenesulfonic acid p.a.;1-Amino-2-naphthol-4
CAS:	116-63-2
MF:	C10H9NO4S
MW:	239.25
EINECS:	204-147-3
Product Categories:	Building Blocks;Chemical Synthesis;Organic Building Blocks;Sulfonic/Sulfinic Acids;Sulfur Compounds;Intermediates of Dyes and Pigments;Sulphur Derivatives;Organic acids
Mol File:	116-63-2.mol

1-Amino-2-naphthol-4-sulfonic acid Chemical Properties

Melting point	290 °C (dec.)(lit.)
density	1.4338 (rough estimate)
refractive index	1.6500 (estimate)
storage temp.	Store below +30°C.
solubility	DMSO (Slightly), Methanol (Slightly)
pka	-0.49±0.40(Predicted)
form	Powder
color	White to light pink
Water Solubility	insoluble
Merck	14,454
BRN	2697469
Stability:	Stable. Incompatible with strong bases, acid chlorides, acid anhydrides, strong oxidizing agents.
InChIKey	RXCMFQDTWCCLBL-UHFFFAOYSA-N
CAS DataBase Reference	116-63-2(CAS DataBase Reference)
NIST Chemistry Reference	1-Naphthalenesulfonic acid,4-amino-3-hydroxy-(116-63-2)
EPA Substance Registry System	1-Naphthalenesulfonic acid, 4-amino-3-hydroxy- (116-63-2)

Safety Information

MSDS Information

Provider	Language
4-Amino-3-hydroxynaphthalene-1-sulphonic acid	English
SigmaAldrich	English
ACROS	English
ALFA	English

1-Amino-2-naphthol-4-sulfonic acid Usage And Synthesis

Chemical Properties	solid
Uses	4-Amino-3-hydroxy-1-naphthalenesulfonic acid is used as mordant dyes and acid dyes intermediate.
Uses	1-Amino-2-naphthol-4-sulfonic acid can be used in determination of phosphate.
Definition	ChEBI: 4-amino-3-hydroxynaphthalene-1-sulfonic acid is a naphthalenesulfonic acid and an aminonaphthalene. It has a role as a mutagen. It is functionally related to a 2-naphthol.
Purification Methods	Purify it by warming 15g of the acid, 150g of NaHSO3 and 5g of Na2SO3(anhydrous) with 1L of water to ca 90o, shaking until most of the solid had dissolved, then filtering hot. The precipitate obtained by adding 10mL of conc HCl to the cooled filtrate is collected, washed with 95% EtOH until the washings are colourless, and is dried under vacuum over CaCl2. It is stored in a dark-coloured bottle, in the cold [Chanley et al. J Am Chem Soc 74 4347 1952]. [Beilstein 14 IV 2825.]

1-Amino-2-naphthol-4-sulfonic acid Preparation Products And Raw materials

Raw materials	Sulfuric acid-->Sodium nitrite-->Sodium sulfite-->Sodium bisulfite-->Sodium metabisulfite-->2-Naphthol
Preparation Products	1-Diazo-2-naphthol-4-sulfonic acid-->Mordant Red 7-->POTASSIUM 1,2-NAPHTHOQUINONE-4-SULFONIC ACID-->Mordant Black 17-->Acid Black 168-->2-DIAZO-1-NAPHTHOL-4-SULFONIC ACID HYDRATE-->Acid violet 90-->Mordant Black 3-->ACID BLUE 161, PURE-->4-[(2,4-dihydroxyphenyl)azo]-3-hydroxynaphthalene-1-sulphonic acid

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