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Naphthalene-2-sulfonic acid

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Products Intro: Product Name:2 – Naphthalene Sulfonic Acid
CAS:120-18-3
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Products Intro: Product Name:Naphthalene-2-sulfonic acid
CAS:120-18-3
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CAS:120-18-3
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Products Intro: Product Name:Naphthalene-2-sulfonic acid
CAS:120-18-3
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Products Intro: Product Name:2-Naphthalenesulfonic Acid
CAS:120-18-3
Purity:98%(Min,HPLC) Package:100g;1kg;5kg,10kg,25kg,50kg

Naphthalene-2-sulfonic acid manufacturers

Naphthalene-2-sulfonic acid Basic information
Product Name:Naphthalene-2-sulfonic acid
Synonyms:2-Naphthalenesulfonicacid,tri;BETA NAPTHALENE SULPHONATE;BETA-NAPHTHALENESULFONIC ACID;2-Naphthalenesulfoni;2-Naphthalenesulfonic Acid ;2-Sulfonaphthalene;Dirinal NSK;2-Naphthalenesulfonic Acid (β-Naphthalenesulfonic acid)
CAS:120-18-3
MF:C10H8O3S
MW:208.23
EINECS:204-375-3
Product Categories:Intermediates of Dyes and Pigments;Imidazoles;Organic Building Blocks;Sulfonic/Sulfinic Acids;Sulfur Compounds
Mol File:120-18-3.mol
Naphthalene-2-sulfonic acid Structure
Naphthalene-2-sulfonic acid Chemical Properties
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.)
pka0.27±0.10(Predicted)
form solid
color White
Water Solubility Soluble in water.
Sensitive Hygroscopic
Merck 6377
LogP-0.944 at 23℃
CAS DataBase Reference120-18-3(CAS DataBase Reference)
EPA Substance Registry System2-Naphthalenesulfonic acid (120-18-3)
Safety Information
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
MSDS Information
ProviderLanguage
2-Naphthalenesulfonic acid English
SigmaAldrich English
Naphthalene-2-sulfonic acid Usage And Synthesis
Chemical PropertiesNondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible.
UsesStarting point in the manufacture of β-naphthol, β-naphtholsulfonic acid, β-naphthylaminesulfonic acid, etc.
UsesNaphthalene-2-sulfonic acid is used in making direct dyes, reactive des and employed as dye and agrochemical intermediates.
DefinitionChEBI: 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.
PreparationNaphthalene-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.
General DescriptionThe 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 ExplosibilityNon flammable
Purification MethodsCrystallise 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.]
Tag:Naphthalene-2-sulfonic acid(120-18-3) Related Product Information
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