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1-NAPHTHOL-3,8-DISULFONIC ACID

1-NAPHTHOL-3,8-DISULFONIC ACID structure

CAS No.: 117-43-1

Chemical Name:: 1-NAPHTHOL-3,8-DISULFONIC ACID

Synonyms: Epsilon acid;Disulfo acid E;Andresen's acid;1-NAPHTHOL-3,8-DISULFONIC ACID;1-NAPHTHOL-3,8-DISULPHONIC ACID;4-Hydroxy-2,5-naphthalenedisulfonic acid;8-Hydroxynaphthalene-1,6-Disulfonic Acid;8-Hydroxy-1,6-naphthalenedisulfonic acid;8phydroxynaphthalene-1,6-disulfonic acid;8-hydroxynaphthalene-1,6-disulphonic acid

CBNumber:: CB7676349

Molecular Formula:: C10H8O7S2

Molecular Weight:: 304.3

MDL Number:: MFCD00035718

MOL File:: 117-43-1.mol

Last updated:2026-05-28 05:57:33

Product description	Number	Pack Size	Price
8-Hydroxynaphthalene-1,6-disulfonic acid 95+%	CD44000723	100g	$233
1-Naphthol-3,8-disulfonic acid 97%	MT-19323	500g	$968
1-Naphthol-3,8-disulfonic acid	AA000DET	10mg	$275
1-Naphthol-3,8-disulfonic acid	AA000DET	1g	$305
1-Naphthol-3,8-disulfonic acid 97%	MT-19323	500g	$968
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1-NAPHTHOL-3,8-DISULFONIC ACID Properties

CAS DataBase Reference	117-43-1(CAS DataBase Reference)
EPA Substance Registry System	1,6-Naphthalenedisulfonic acid, 8-hydroxy- (117-43-1)

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H302-H315-H319-H335
Precautionary statements	P261-P305+P351+P338
TSCA	TSCA listed

1-NAPHTHOL-3,8-DISULFONIC ACID price More Price(20)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Crysdot	CD44000723	8-Hydroxynaphthalene-1,6-disulfonic acid 95+%	117-43-1	100g	$233	2026-05-27	Buy
AHH	MT-19323	1-Naphthol-3,8-disulfonic acid 97%		500g	$968	2026-05-26	Buy
aablocks	AA000DET	1-Naphthol-3,8-disulfonic acid	117-43-1	10mg	$275	2026-05-25	Buy
aablocks	AA000DET	1-Naphthol-3,8-disulfonic acid	117-43-1	1g	$305	2026-05-25	Buy
AHH	MT-19323	1-Naphthol-3,8-disulfonic acid 97%		500g	$968	2026-05-25	Buy

Product number	Packaging	Price	Buy
CD44000723	100g	$233	Buy
MT-19323	500g	$968	Buy
AA000DET	10mg	$275	Buy
AA000DET	1g	$305	Buy
MT-19323	500g	$968	Buy

1-NAPHTHOL-3,8-DISULFONIC ACID Chemical Properties,Uses,Production

Chemical Properties

White, crystalline scales. Soluble in hot water. 1-Hydroxynaphthalene-3,8-disulfonic acid [117-43-1]. (8-hydroxynaphthalene-1,6- disulfonic acid), epsilon acid, C10H8O7S2, Mr 304.3: the sodium salt crystallizes as the hexahydrate and is readily soluble in water. Alkali fusion at 200 ℃ gives 1,8-dihydroxynaphthalene-3-sulfonic acid and amination with ammonia and ammonium chloride at 170℃ gives 6,8-diaminonaphthalene-1-sulfonic acid. Diazo coupling takes place in the 2-position and bromination in the 4-position. The 1,8-sultone is formed on dehydration with concentrated sulfuric acid.

Uses

Azo-dye intermediate.

Production Methods

The acid sodium salt of 1-aminonaphthalene-3,8-disulfonic acid is hydrolyzed by heating with water under pressure at 180℃.

1-NAPHTHOL-3,8-DISULFONIC ACID synthesis

Synthesis of 1-NAPHTHOL-3,8-DISULFONIC ACID from 8-Aminonaphthalene-1,6-disulfonic acid

1-NAPHTHOL-3,8-DISULFONIC ACID Preparation Products And Raw materials

Raw materials

8-Aminonaphthalene-1,6-disulfonic acid Water Sulfuric acid

Preparation Products

1,6-Naphthalenedisulfonic acid, 8-hydroxy-7-[[4-(6-methyl-2-benzothiazolyl)phenyl]azo]-, disodium salt 1,6-Naphthalenedisulfonic acid, 7-[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-8-hydroxy-, trisodium salt Acid Red 21 4-Hydroxy-3-[[4'-[(2-hydroxy-8-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,5-disulfonic acid disodium salt DIRECT BLUE 98

1,6-Naphthalenedisulfonic acid, 7-[[4-(4,6-dimethyl-2-benzothiazolyl)-2-methylphenyl]azo]-8-hydroxy-, disodium salt tetrasodium [mu-[[7,7'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[8-hydroxynaphthalene-1,6-disulphonato]](8-)]]dicuprate(4-) C.I.Direct Blue 30 1,6-Naphthalenedisulfonic acid, 8-hydroxy-7-[[4-[[4'-[(1-hydroxy-3,8-disulfo-2-naphthalenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-1-naphthalenyl]azo]-, tetrasodium salt Acid Blue 154

Direct Sky Blue FB

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1-NAPHTHOL-3,8-DISULFONIC ACID Suppliers

Global( 56)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Alchem Pharmtech,Inc.	8485655694	sales@alchempharmtech.com	United States	63687	58
career henan chemical co	+86-0371-86658258	factory@coreychem.com	China	29792	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +86-189 4982 3763	sales@tnjchem.com	China	34563	58
Wuhan Fortuna Chemical Co., Ltd	+86-27-59207850	info@fortunachem.com	China	6002	58
Dayang Chem (Hangzhou) Co.,Ltd.	+86-0571-88938639 17705817739	info@dycnchem.com	China	52704	58
Alfa Chemistry	+1-5166625404;	Info@alfa-chemistry.com	United States	20000	58
Hangzhou MolCore BioPharmatech Co.,Ltd.	+86-057181025280; +8617767106207	sales@molcore.com	China	49734	58
GIHI CHEMICALS CO.,LIMITED	+86-571-86217390; +8618058761490	info@gihichemicals.com	China	49895	58
SUZHOU SENFEIDA CHEMICAL CO.,LTD	+86-0512-83500002 +86-15195660023	3899766280@qq.com	China	26362	58
Aladdin Scientific		tp@aladdinsci.com	United States	52923	58

Supplier	Advantage
Alchem Pharmtech,Inc.	58
career henan chemical co	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Wuhan Fortuna Chemical Co., Ltd	58
Dayang Chem (Hangzhou) Co.,Ltd.	58
Alfa Chemistry	58
Hangzhou MolCore BioPharmatech Co.,Ltd.	58
GIHI CHEMICALS CO.,LIMITED	58
SUZHOU SENFEIDA CHEMICAL CO.,LTD	58
Aladdin Scientific	58

View Lastest Price from 1-NAPHTHOL-3,8-DISULFONIC ACID manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-08-03	8-hydroxynaphthalene-1,6-disulphonic acid 117-43-1		1KG	98%min	30tons/month	WUHAN FORTUNA CHEMICAL CO., LTD
	2019-12-26	1-NAPHTHOL-3,8-DISULFONIC ACID 117-43-1	$1.00	1IU	99%	500KG	Career Henan Chemical Co

8-hydroxynaphthalene-1,6-disulphonic acid
117-43-1
$0.00
98%min
WUHAN FORTUNA CHEMICAL CO., LTD

1-NAPHTHOL-3,8-DISULFONIC ACID
117-43-1
$1.00
99%
Career Henan Chemical Co

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1-NAPHTHOL-3,8-DISULFONIC ACID 8-Hydroxynaphthalene-1,6-Disulfonic Acid 8-hydroxynaphthalene-1,6-disulphonic acid 8phydroxynaphthalene-1,6-disulfonic acid 8-Hydroxy-1,6-naphthalenedisulfonic acid Disulfo acid E 4-Hydroxy-2,5-naphthalenedisulfonic acid Andresen's acid 1,6-Naphthalenedisulfonic acid, 8-hydroxy- Epsilon acid 1-NAPHTHOL-3,8-DISULPHONIC ACID 117-43-1 C10H8O7S2 Intermediates of Dyes and Pigments

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