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
- Molecular Weight:
- 208.23
- MOL File:
- 120-18-3.mol
- Modify Date:
- 2023/12/25 13:23:17
| 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) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS05 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H290-H314 | |||||||||
| Precautionary statements | P260-P280-P301+P330+P331-P303+P361+P353-P305+P351+P338+P310 | |||||||||
| 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 | |||||||||
| NFPA 704 |
|
Naphthalene-2-sulfonic acid price More Price(9)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 5G | ₹4504.85 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 5G | ₹4504.85 | 2022-06-14 | Buy |
| Sigma-Aldrich | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 100G | ₹8830.35 | 2022-06-14 | Buy |
| Sigma-Aldrich | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 100G | ₹8830.35 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 100G | ₹8830.35 | 2022-06-14 | Buy |
Naphthalene-2-sulfonic acid Chemical Properties,Uses,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.
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.
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.
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.
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
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chevron_rightPreparation Products
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chevron_right| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| CHEMSWORTH | +91-261-2397244 | New Delhi, India | 6700 | 30 | Inquiry |
| Triveni chemicals | 08048762458 | New Delhi, India | 6088 | 58 | Inquiry |
| Vsk Pharma International | 08048371720Ext 359 | Hyderabad, India | 11 | 58 | Inquiry |
| Ruchi Organics | 09867222508 | Maharashtra, India | 10 | 58 | Inquiry |
| GVSK Pharma Private Limited | 07942560916 | Hyderabad, India | 32 | 58 | Inquiry |
| Sisco Research Laboratories Pvt. Ltd. | +91-22-4268 5800 | Mumbai, India | 4315 | 58 | Inquiry |
| Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6905 | 58 | Inquiry |
| SynZeal Research Pvt Ltd | +1 226-802-2078 | Gujarat, India | 6514 | 58 | Inquiry |
| Suzhou Actchem Co., Ltd. | +8618762124502 | China | 27 | 58 | Inquiry |
| Hebei Mojin Biotechnology Co., Ltd | +86 13288715578 +8613288715578 | China | 12835 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| CHEMSWORTH | 30 |
| Triveni chemicals | 58 |
| Vsk Pharma International | 58 |
| Ruchi Organics | 58 |
| GVSK Pharma Private Limited | 58 |
| Sisco Research Laboratories Pvt. Ltd. | 58 |
| Alfa Aesar | 58 |
| SynZeal Research Pvt Ltd | 58 |
| Suzhou Actchem Co., Ltd. | 58 |
| Hebei Mojin Biotechnology Co., Ltd | 58 |