6-Amino-4-hydroxy-2-naphthalenesulfonic acid

CAS No.：90-51-7

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6-Amino-4-hydroxy-2-naphthalenesulfonic acid Basic information

Product Name:	6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Synonyms:	Galmarine(silymarine soluble);2-Amino-8-hydroxynaphthalene-6-sulfonic acid;6-AMINO-4-HYDROXY-2-NAPHTHALENE-SULPHONICACID;6-Amino-4-hydroxy-2-naphthalinsulfonsure;6-AMINO-4-HYDROXY-2-NAPHTHALENESULFONIC ACID (GAMMA ACID);2-AMINO-8-NAPTHOL-6-SULFONIC ACID;1-Hydroxy-7-amino-3-naphthalenesulfonic acid;4-Hydroxy-6-amino-2-naphthalenesulfonic acid
CAS:	90-51-7
MF:	C10H9NO4S
MW:	239.25
EINECS:	202-000-8
Product Categories:	Building Blocks;Chemical Synthesis;Intermediates;Organic Building Blocks;Sulfonic/Sulfinic Acids;Sulfur Compounds;Intermediates of Dyes and Pigments;Organics
Mol File:	90-51-7.mol

6-Amino-4-hydroxy-2-naphthalenesulfonic acid Chemical Properties

Boiling point	458℃[at 101 325 Pa]
density	1.4338 (rough estimate)
vapor pressure	0Pa at 25℃
refractive index	1.6500 (estimate)
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
form	powder to crystal
pka	-0.20±0.40(Predicted)
color	White to Gray to Brown
Water Solubility	4.5g/L(hot water)
InChIKey	HBZVNWNSRNTWPS-UHFFFAOYSA-N
LogP	-1.39
CAS DataBase Reference	90-51-7(CAS DataBase Reference)
EPA Substance Registry System	2-Naphthalenesulfonic acid, 6-amino-4-hydroxy- (90-51-7)

Safety Information

Hazard Codes	C
Risk Statements	34
Safety Statements	26-27-28-36/37/39-45
RIDADR	UN 2585 8/PG 3
WGK Germany	1
RTECS	QK1295250
Toxicity	LD50 intraperitoneal in mouse: > 500mg/kg

MSDS Information

Provider	Language
SigmaAldrich	English

6-Amino-4-hydroxy-2-naphthalenesulfonic acid Usage And Synthesis

Uses	6-Amino-?4-?hydroxy-2-naphthalenesulfonic Acid is used in the synthesis of mono-azo dyes for application towards synthetic fibers. Also used in the synthesis of dyes with high technical properties for silk.
Flammability and Explosibility	Notclassified

6-Amino-4-hydroxy-2-naphthalenesulfonic acid Preparation Products And Raw materials

Raw materials

Sodium hydroxide-->Sulfur dioxide-->2-Naphthol-->2-Naphthylamine

Preparation Products

disodium 5-((4-acetylamino-2-sulphophenyl)azo)-6-amino-4-hydroxynaphthalene-2-disulphonate-->Direct Grey D-->4-Amino-6-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt-->C.I. Direct Black 151-->Direct Grey D-->Acid Red 440-->Direct Black 197-->CHLORAZOL BLACK BH-->5-[[2,4-Diamino-5-[(8-hydroxy-6-sodiosulfo-2-naphthalenyl)azo]phenyl]azo]-4-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt-->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-->DIRECT BLACK 22-->C.I. Direct Brown 166-->2-Naphthalenesulfonic acid, 6-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-4-hydroxy-, disodium salt-->Glycine, N-[5-amino-4-[2-[4-[2-[[2-(2,4-diamino-5-methylphenyl)diazenyl]hydroxysulfo-2-naphthalenyl]diazenyl]phenyl]diazenyl]-2-methylphenyl]-, sodium salt (1:2)-->ACID RED 266-->disodium 6-amino-5-[(4-amino-2-sulphonatophenyl)azo]-4-hydroxynaphthalene-2-sulphonate

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