| 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 |
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| 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.) |
| pka | 0.27±0.10(Predicted) |
| form | solid |
| 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) |
| Naphthalene-2-sulfonic acid Usage And Synthesis |
| 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 | Nonflammable |
| 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.] |
Packing &shipping&Payment
Packing:25kg/drum
Shipping:by sea or by air
Payment:T/T,western union,moneygram
Packaging Details drum
Port:Tianjin
Lead Time :
| Quantity(Kilograms) | 1 - 10000 | >10000 |
| Est. Time(days) | 5 | To be negotiated |
Company information
Hebei Mojin Biotechnology Co., Ltd, Our company is a professional in 4'-Methylacetophenone,Levamisole hydrochloride ,N-Methylformamide and other chemical reagents research and development production enterprises. Our business covers more than 30 countries, most of the big customers come from Europe, America and other countries in the world, we can guarantee the quality and price. In recent decades, with the efforts of all employees, we have established many cooperative companies in shandong, henan, guangdong and other places. Our corporate purpose is based on the market, enhance the strength, take the road of scientific and environmental sustainable development, relying on the country. Technology r & d center, increase the investment in r & d, based on the domestic market, expand the international market, manufacturing quality products, sincere service to the society, into a modern, ecological, scientific and technological enterprise world.
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