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Naphthalene-2-sulfonic acid

Naphthalene-2-sulfonic acid
Naphthalene-2-sulfonic acid
Chemical Name:
Naphthalene-2-sulfonic acid
Dirinal NSK;2-Sulfonaphthalene;2-Naphthalenesulfoni;β-Naphthalenesulfonic;beta-naphthalenesulfonic;beta-naphthylsulfonicacid;BETA NAPTHALENE SULPHONATE;2-NAPHTHALENESULFONIC ACID;β-Naphthalene sulfonic acid;kyselina2-naftalensulfonova
Molecular Formula:
Formula Weight:
MOL File:

Naphthalene-2-sulfonic acid Properties

Melting point:
124 °C
Boiling point:
317.43°C (rough estimate)
1.44 g/cm
refractive index 
1.4998 (estimate)
water: freely soluble(lit.)
Water Solubility 
Soluble in water.
CAS DataBase Reference
120-18-3(CAS DataBase Reference)
EPA Substance Registry System
2-Naphthalenesulfonic acid(120-18-3)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
HazardClass  8
PackingGroup  III
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Naphthalene-2-sulfonic acid price More Price(4)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 249548 2-Naphthalenesulfonic acid technical grade, 70% 120-18-3 5g $40.9 2018-11-13 Buy
Sigma-Aldrich 249548 2-Naphthalenesulfonic acid technical grade, 70% 120-18-3 100g $73.7 2018-11-13 Buy
Alfa Aesar H56685 Naphthalene-2-sulfonic acid, 98% 120-18-3 500g $262 2018-11-15 Buy
Alfa Aesar H56685 Naphthalene-2-sulfonic acid, 98% 120-18-3 100g $70 2018-11-15 Buy

Naphthalene-2-sulfonic acid Chemical Properties,Uses,Production

Chemical Properties

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


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


ChEBI: A naphthalenesulfonic acid in which the sulfo group is linked to position 2 of the naphthalene ring.

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

Preparation Products

Naphthalene-2-sulfonic acid Suppliers

Global( 162)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
+86 (0)571-855 867 18
+86 (0)571-858 647 95 China 19958 60
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 CHINA 3218 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22063 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32764 55
career henan chemical co
+86-371-86658258 CHINA 20001 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
future industrial shanghai co., ltd 400-0066-400;021-60496031
021-55660885 China 2042 65
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84
ShangHai DEMO Chemical Co.,Ltd 400-021-7337 qq:2355568890
0086-21-50182339; China 2607 57

View Lastest Price from Naphthalene-2-sulfonic acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 Naphthalene-2-sulfonic acid
US $1.00 / kg 1kg 98% 1000kg career henan chemical co

Naphthalene-2-sulfonic acid Spectrum

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