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1-Hydroxynaphthalene-8-sulfonic acid

Product Name
1-Hydroxynaphthalene-8-sulfonic acid
CAS No.
117-22-6
Chemical Name
1-Hydroxynaphthalene-8-sulfonic acid
Synonyms
1-NAPHTHOL-8-SULFOMIC ACID;1 NAPTHOL-8-SULPHONIC ACID;1-NAPHTHOL-8-SULFONIC ACID;alpha-Naphthol-8-sulfonic acid;1-Hydroxynaphthalene-8-sulfonicaci;8-hydroxynaphthalenesulphonic acid;8hydroxynaphthalene-1-sulfonic acid;1-Hydroxynaphthalene-8-sulfonic acid;8-hydroxy-1-naphthalenesulfonic acid;1-Naphthalenesulfonic acid, 8-hydroxy-
CBNumber
CB5405682
Molecular Formula
C10H8O4S
Formula Weight
224.23
MOL File
117-22-6.mol
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1-Hydroxynaphthalene-8-sulfonic acid Property

Density 
1.549
pka
0.05±0.40(Predicted)
CAS DataBase Reference
117-22-6(CAS DataBase Reference)
EPA Substance Registry System
1-Naphthalenesulfonic acid, 8-hydroxy- (117-22-6)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

TRC
Product number
N325065
Product name
1-Naphthol-8-sulfonicAcid
Packaging
500mg
Price
$110
Updated
2021/12/16
TRC
Product number
N325065
Product name
1-Naphthol-8-sulfonicAcid
Packaging
50mg
Price
$45
Updated
2021/12/16
TRC
Product number
N325065
Product name
1-Naphthol-8-sulfonicAcid
Packaging
100mg
Price
$60
Updated
2021/12/16
AK Scientific
Product number
A898
Product name
8-Hydroxy-1-naphthalenesulfonicacid
Packaging
1g
Price
$98
Updated
2021/12/16
American Custom Chemicals Corporation
Product number
CHM0092430
Product name
1-NAPHTHOL-8-SULFONIC ACID
Purity
95.00%
Packaging
5MG
Price
$497.04
Updated
2021/12/16
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1-Hydroxynaphthalene-8-sulfonic acid Chemical Properties,Usage,Production

Chemical Properties

1-Hydroxynaphthalene-8-sulfonic acid [117-22-6]. (8-hydroxynaphthalene-1-sulfonic acid), C10H8O4S, Mr 224.2, crystallizes as the monohydrate with mp 106℃. Sulfonation gives 1-hydroxynaphthalene-4,8-disulfonic acid, and alkali fusion with potassium hydroxide at 230℃ yields 1,8-dihydroxynaphthalene. Coupling with diazo compounds occurs in the 2- position.

Uses

The naphthosultone is usually satisfactory as an intermediate for further processing; however, for azo dye preparation the free naphthol must be used, for example, in C.I. Acid Black 54 and C.I. Acid Blue 158.

Production Methods

1-Aminonaphthalene-8-sulfonic acid is diazotized over 16 h at 50℃ and then heated to 80 ℃. After cooling, the precipitated naphthosultone is filtered off and washed. The sultone is heated with dilute sodium hydroxide at 100℃, which causes ring opening; the product is isolated after salting out.

1-Hydroxynaphthalene-8-sulfonic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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