ChemicalBook > CAS DataBase List > Naphthalene-2-sulfonic acid

Naphthalene-2-sulfonic acid

Product Name
Naphthalene-2-sulfonic acid
CAS No.
120-18-3
Chemical Name
Naphthalene-2-sulfonic acid
Synonyms
2-NAPHTHALENESULFONIC ACID;NAPHTHALENE-2-SULPHONIC ACID;Dirinal NSK;2-Sulfonaphthalene;2-Naphthalenesulfoni;β-Naphthalenesulfonic;β-Naphthalenesulfonic;beta-naphthalenesulfonic;beta-naphthylsulfonicacid;2-NAPHTHALENESULFONIC ACI
CBNumber
CB8118079
Molecular Formula
C10H8O3S
Formula Weight
208.23
MOL File
120-18-3.mol
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Naphthalene-2-sulfonic acid Property

Melting point:
124 °C
Boiling point:
317.43°C (rough estimate)
Density 
1.44 g/cm
vapor pressure 
2.33Pa at 20℃
refractive index 
1.4998 (estimate)
storage temp. 
Inert atmosphere,Room Temperature
solubility 
water: freely soluble(lit.)
form 
solid
pka
0.27±0.10(Predicted)
color 
White
Water Solubility 
Soluble in water.
Sensitive 
Hygroscopic
Merck 
6377
LogP
-0.944 at 23℃
CAS DataBase Reference
120-18-3(CAS DataBase Reference)
EPA Substance Registry System
2-Naphthalenesulfonic acid (120-18-3)
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Safety

Hazard Codes 
C,F
Risk Statements 
35-34-11
Safety Statements 
26-36/37/39-45-16
RIDADR 
UN 2583 8/PG 2
WGK Germany 
1
RTECS 
QK1225000
Hazard Note 
Corrosive
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
2904100090
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H290May be corrosive to metals

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

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

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
249548
Product name
2-Naphthalenesulfonic acid
Purity
technical grade, 70%
Packaging
5g
Price
$26
Updated
2024/03/01
Sigma-Aldrich
Product number
249548
Product name
2-Naphthalenesulfonic acid
Purity
technical grade, 70%
Packaging
100g
Price
$120
Updated
2024/03/01
Alfa Aesar
Product number
H56685
Product name
Naphthalene-2-sulfonic acid, 98%
Packaging
100g
Price
$95.3
Updated
2024/03/01
Alfa Aesar
Product number
H56685
Product name
Naphthalene-2-sulfonic acid, 98%
Packaging
500g
Price
$385
Updated
2024/03/01
TRC
Product number
N378503
Product name
Naphthalene-2-sulfonicAcid
Packaging
1g
Price
$45
Updated
2021/12/16
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Naphthalene-2-sulfonic acid Chemical Properties,Usage,Production

Chemical Properties

Nondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible.

Uses

Naphthalene-2-sulfonic acid is used in making direct dyes, reactive des and employed as dye and agrochemical intermediates.

Uses

Starting point in the manufacture of β-naphthol, β-naphtholsulfonic acid, β-naphthylaminesulfonic acid, etc.

Preparation

Naphthalene-2-sulfonic acid is prepared by sulfonation of naphthalene.
Step: With naphthalene as raw material, 98% sulfuric acid is used as sulfonating agent, and it is obtained by sulfonation at 160-166 ℃. During the sulfonation process, a small amount of α-naphthalenesulfonic acid by-product is generated. By heating, the unstable α-naphthalenesulfonic acid can be hydrolyzed at 140-150 °C to remove the sulfonic acid group, and become naphthalene and sulfuric acid. Naphthalene can be blown out. During the hydrolysis of naphthalene, a small amount of lye should be added to neutralize part of the sulfuric acid. It also acts with naphthalenesulfonic acid to form β-naphthalenesulfonic acid sodium salt crystals, which can be filtered to obtain the finished product of Naphthalene-2-sulfonic acid.

Definition

ChEBI: Naphthalene-2-sulfonic acid is a naphthalenesulfonic acid in which the sulfo group is linked to position 2 of the naphthalene ring. It has a role as an environmental contaminant and a xenobiotic.

General Description

The fluorescence of 2-naphthalenesulfonic acid (NSA) is effectively quenched by colloidal silver via photoinduced interfacial electron transfer from the excited singlet of NSA to silver. Adsorption behavior of NSA on a conventional macroporous resin Amberlite XAD4 and hypercrosslinked resins NDA101 and NDA100 has been investigated.

Flammability and Explosibility

Non flammable

Purification Methods

Crystallise the acid from conc HCl. The S-benzylisothiuronium salt has m 192o (from aqueous EtOH). [Berger Acta Chem Scand 8 432 1954, Beilstein 11 H 171, 11 IV 527.]

Naphthalene-2-sulfonic acid Preparation Products And Raw materials

Raw materials

Sodium 2-naphthalenesulfonate 1-Naphthalenesulfonic acid

Preparation Products

1-Naphthol disodium methylenebisnaphthalenesulphonate Ambroxane Acid Red 154 dispersant FDN-90 1-Aminonaphthalene-6-sulfonic acid Sodium 2-naphthalenesulfonate disodium 3,3'-[cyclohexylidenebis[(2-methoxy-4,1-phenylene)azo]]bis(4,6-dihydroxynaphthalene-2-sulphonate) L-Leucine 2-Naphthol 1-Naphthalenesulfonic acid
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Naphthalene-2-sulfonic acid Suppliers

China 278 Europe 2 Germany 2 India 8 Japan 2 Switzerland 1 United Kingdom 6 United States 20 Global 319
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View Lastest Price from Naphthalene-2-sulfonic acid manufacturers

Hebei Yanxi Chemical Co., Ltd.
Product
Naphthalene-2-sulfonic acid 120-18-3
Price
US $20.00-10.00/kg
Min. Order
25kg
Purity
99%
Supply Ability
100T
Release date
2023-03-09
Hebei Weibang Biotechnology Co., Ltd
Product
Naphthalene-2-sulfonic acid 120-18-3
Price
US $9.90/KG
Min. Order
1KG
Purity
99%
Supply Ability
5tons
Release date
2021-10-12
Henan Fengda Chemical Co., Ltd
Product
Naphthalene-2-sulfonic acid 120-18-3
Price
US $100.00-1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
g-kg-tons, free sample is available
Release date
2023-12-25

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