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1-Naphthol-4-sulfonic acid

1-Naphthol-4-sulfonic acid structure

CAS No.: 84-87-7

Chemical Name:: 1-Naphthol-4-sulfonic acid

Synonyms: Niven acid;Neville acid;1,4-Oxy Acid;Nevile-Winther acid;Nevile-Winthers acid;1-Naphthol-4-sulfoni;HIGH-PURITY N.W. ACID;Nevileandwinther’sacid;Neville and winther acid;Naphthol-4-sulfonic acid

CBNumber:: CB5743566

Molecular Formula:: C10H8O4S

Molecular Weight:: 224.23

MDL Number:: MFCD00065324

MOL File:: 84-87-7.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-28 02:22:59

Product description	Number	Pack Size	Price
1-NAPHTHOL-4-SULFONIC ACID 97%	64546	1G	$46
1-NAPHTHOL-4-SULFONIC ACID 97%	64546	5G	$169
1-NAPHTHOL-4-SULFONIC ACID 97%	64546	25G	$398
4-Hydroxynaphthalene-1-Sulfonic Acid 95%	AA004W72	1g	$40
4-Hydroxynaphthalene-1-Sulfonic Acid 95%	AA004W72	5g	$148
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1-Naphthol-4-sulfonic acid Properties

Melting point	170℃
Boiling point	335.63°C (rough estimate)
Density	1.4643 (rough estimate)
refractive index	1.7040 (estimate)
storage temp.	2-8°C, stored under nitrogen, away from moisture
pka	0.73±0.40(Predicted)
form	solid
form	solid
color	white to yellow
InChI	InChI=1S/C10H8O4S/c11-9-5-6-10(15(12,13)14)8-4-2-1-3-7(8)9/h1-6,11H,(H,12,13,14)
InChIKey	HGWQOFDAUWCQDA-UHFFFAOYSA-N
SMILES	C1(S(O)(=O)=O)=C2C(C=CC=C2)=C(O)C=C1
CAS DataBase Reference	84-87-7(CAS DataBase Reference)
FDA UNII	6W41U3C9YN
EPA Substance Registry System	1-Naphthalenesulfonic acid, 4-hydroxy- (84-87-7)

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
REACH Registrations	Active

1-Naphthol-4-sulfonic acid price More Price(32)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
AstaTech	64546	1-NAPHTHOL-4-SULFONIC ACID 97%	84-87-7	1G	$46	2026-04-30	Buy
AstaTech	64546	1-NAPHTHOL-4-SULFONIC ACID 97%	84-87-7	5G	$169	2026-04-30	Buy
AstaTech	64546	1-NAPHTHOL-4-SULFONIC ACID 97%	84-87-7	25G	$398	2026-04-30	Buy
aablocks	AA004W72	4-Hydroxynaphthalene-1-Sulfonic Acid 95%	84-87-7	1g	$40	2026-05-28	Buy
aablocks	AA004W72	4-Hydroxynaphthalene-1-Sulfonic Acid 95%	84-87-7	5g	$148	2026-05-28	Buy

Product number	Packaging	Price	Buy
64546	1G	$46	Buy
64546	5G	$169	Buy
64546	25G	$398	Buy
AA004W72	1g	$40	Buy
AA004W72	5g	$148	Buy

1-Naphthol-4-sulfonic acid Chemical Properties,Uses,Production

Chemical Properties

Transparent flake crystal. soluble in water. 1-Hydroxynaphthalene- 4 -sulfonic acid [84-87-7]. (4-hydroxynaphthalene-1-sulfonic acid), Nevile and Winther’s acid, NW acid, C10H8O4S, Mr 224.23, and its salts are water soluble, but the sodium salt may be precipitated from solution by salting out. Coupling with diazo compounds takes place in the 2-position. Nitration yields 2,4-dinitro-1-naphthol, whereas nitrosation gives 2-nitroso-1-hydroxynaphthalene-4-sulfonic acid. Sulfonation leads to a mixture of 1-hydroxynaphthalene-2,4-di- and 2,4,7- trisulfonic acids.

Uses

1-Naphthol-4-sulfonic acid is used as an intermediate of azo dyes to prepare dyes such as direct copper blue BR and 2R, direct violet RB, acid red B and acid medium jujube red B

Preparation

After drying under vacuum, the resulting filter cake contains 1-naphthol-4-sulphonic acid in a yield of 92% of theory and <0.5% 1-naphthol-2-sulphonic acid and 3% of 1-naphthol-2,4-disulphonic acid based on the weight of 1-naphthol-4-sulphonic acid.

Synthesis

1-Naphthol-4-sulfonic acid was synthesized by addition, hydrolysis and acid precipitation of sodium 1,4-aminonaphthalene sulfonate.

1-Naphthol-4-sulfonic acid Preparation Products And Raw materials

Raw materials

Sodium bisulfite Naphthionic acid

Preparation Products

disodium 3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate Acid Red 374 sodium 3-[[4-(benzoylethylamino)-2-methylphenyl]azo]-4-hydroxynaphthalene-1-sulphonate Direct Blue 151 C.I. 14720

sodium 4-hydroxy-3-[[3-(phenylsulphamoyl)-p-tolyl]azo]naphthalenesulphonate 3-[(5-Chloro-2-hydroxy-3-sulfophenyl)azo]-4-hydroxy-1-naphthalenesulfonic acid disodium salt 5-Amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulfonaphthalen-2-yl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2,7-naphthalenedisulfonic acid trisodium salt disodium 3-[[4'-[[6-amino-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate 4,4'-[(2-Methyl-5-sodiosulfo-1,3-phenylene)bis[azo(4,6-diamino-3,1-phenylene)azo]]bis[naphthalene-1-sulfonic acid sodium] salt

BENZOAZURINE BRILLIANT PURPURIN R THIAZINE RED Acid Violet 131 NAPHTHALENE SCARLET B

Aluminium, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3-naphthalenedisulfonic acid complex Mordant Violet 2 DIRECTVIOLET32 disodium (3Z)-3-[[4-(4-anilino-3-sulfonato-phenyl)diazenylnaphthalen-1-yl]hydrazinylidene]-4-oxo-naphthalene-1-sulfonate 3-[[2-[(N-Ethyl-N-phenylamino)sulfonyl]phenyl]azo]-4-hydroxy-1-naphthalenesulfonic acid sodium salt

6-Amino-4-hydroxy-5-[[4'-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt OXAMINE BLUE 4R

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1-Naphthol-4-sulfonic acid Suppliers

Global( 216)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Hebei Zhuanglai Chemical Trading Co.,Ltd	+8613343047651	admin@zlchemi.com	China	3692	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21588	55
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29815	58
Xiamen AmoyChem Co., Ltd	+86-86-5926051114 +8615060885618	sales@amoychem.com	China	6366	58
Shandong chuangyingchemical Co., Ltd.	18853181302	sale@chuangyingchem.com	CHINA	5906	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	+8613580539051	joe@yuhengpharm.com	CHINA	21142	58
Hebei Yanxi Chemical Co., Ltd.	+8618531123677	faithe@yan-xi.com	China	5853	58
SIMAGCHEM CORP	+86-5922680277 +86-13806087780	sale@simagchem.com	China	17346	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	18895	58

Supplier	Advantage
Hebei Zhuanglai Chemical Trading Co.,Ltd	58
Henan Tianfu Chemical Co.,Ltd.	55
career henan chemical co	58
Xiamen AmoyChem Co., Ltd	58
Shandong chuangyingchemical Co., Ltd.	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	58
Hebei Yanxi Chemical Co., Ltd.	58
SIMAGCHEM CORP	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Dideu Industries Group Limited	58

View Lastest Price from 1-Naphthol-4-sulfonic acid manufacturers

Update time	Product	Min. Order	Purity	Supply Ability	Manufacturer
2026-05-29	1-Naphthol-4-sulfonic acid 84-87-7	1KG	98%min	30tons/month	WUHAN FORTUNA CHEMICAL CO., LTD
2025-12-29	1-Naphthol-4-sulfonic acid 84-87-7	1kg	70%		Changzhou waston chemical technology Co.,Ltd
2025-06-20	1-Naphthol-4-sulfonic acid 84-87-7	1kg	65.00%	20tons	Hebei Yanxi Chemical Co., Ltd.

1-Naphthol-4-sulfonic acid
84-87-7
$0.00
98%min
WUHAN FORTUNA CHEMICAL CO., LTD

1-Naphthol-4-sulfonic acid
84-87-7
$0.00
70%
Changzhou waston chemical technology Co.,Ltd

1-Naphthol-4-sulfonic acid
84-87-7
$0.00
65.00%
Hebei Yanxi Chemical Co., Ltd.

1-Naphthol-4-sulfonic acid Spectrum

1-Naphthol-4-sulfonic acid(84-87-7)¹HNMR

84-87-7(1-Naphthol-4-sulfonic acid )Related Search:

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Naphthalene-2-sulfonic acid CHLOROPHOSPHONAZO III Terbinafine hydrochloride Sodium 2-naphthalenesulfonate 1-Naphthol

1,1'-Bi-2-naphthol 1-NAPHTHOL-4-SULFONIC ACID SODIUM SALT 2-NITROSO-1-NAPHTHOL-4-SULFONIC ACID BENZOAZURINE ACID RED 4

THIAZINE RED AZO BLUE PONCEAU SX

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1-Naphthalenesulfonicacid,4-hydroxy- 4-hydroxy-1-naphthalenesulfonicaci 4-hydroxynaphthalene-1-sulphonicacid Nevileandwinther’sacid N-(M-SULFOPHENYL) GAMMA ACID 4-Hydroxy-1-naphthalenesulfonic acid 1-NAPHTHOL-4-SULFONIC ACID Nevile-Winthers acid Meville-winter acid(1-naphthol-4-sulfonic acid,NW-acid) 4-hydroxynaphthalene-1-sulfonic acid NEVILLE-WINTHER ACID (NA SALT) 1-Hydroxy-4-sulfonaphthalene HIGH-PURITY N.W. ACID 1-Hydroxy-4-naphthalenesulfonic acid Neville acid Neville and winther acid 1,4-Oxy Acid a-Naphthol-4-sulfonic acid Nevile-Winther acid 1-Naphthol-4-sulfoni Naphthol-4-sulfonic acid 1-Naphthol-4-sulfonicaci 1-Naphthol-4-sulfonic acid ISO 9001：2015 REACH 4-Hydroxynaphthalene-1-sulfonicacid hydrate Niven acid 1-Naphthol-4-sulfonic acid (Nevanil acid) Sodium 1-phthol-4-sulfote 84-87-7 C10H8O4S Intermediates of Dyes and Pigments