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;beta-naphthalenesulfonic;beta-naphthylsulfonicacid;2-NAPHTHALENESULFONIC ACI;naphthalene-2-sulfonicaci
- CBNumber:
- CB8118079
- Molecular Formula:
- C10H8O3S
- Molecular Weight:
- 208.23
- MDL Number:
- MFCD00004089
- MOL File:
- 120-18-3.mol
| 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) |
| EWG's Food Scores | 1 |
| FDA UNII | O9S4K2S25E |
| EPA Substance Registry System | 2-Naphthalenesulfonic acid (120-18-3) |
| UNSPSC Code | 12352100 |
| NACRES | NA.22 |
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(12)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 5g | $26 | 2024-03-01 | Buy |
| Sigma-Aldrich | 249548 | 2-Naphthalenesulfonic acid technical grade, 70% | 120-18-3 | 100g | $120 | 2024-03-01 | Buy |
| Alfa Aesar | H56685 | Naphthalene-2-sulfonic acid, 98% | 120-18-3 | 100g | $95.3 | 2024-03-01 | Buy |
| Alfa Aesar | H56685 | Naphthalene-2-sulfonic acid, 98% | 120-18-3 | 500g | $385 | 2024-03-01 | Buy |
| TRC | N378503 | Naphthalene-2-sulfonicAcid | 120-18-3 | 1g | $45 | 2021-12-16 | Buy |
Naphthalene-2-sulfonic acid Chemical Properties,Uses,Production
Chemical Properties
Nondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible.
Uses
Starting point in the manufacture of β-naphthol, β-naphtholsulfonic acid, β-naphthylaminesulfonic acid, etc.
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.
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
1of2
Preparation Products
1of3
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Suzhou Actchem Co., Ltd. | +8618762124502 | actchem@qq.com | China | 27 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615531157085 | abby@chuanghaibio.com | China | 8808 | 58 |
| Hebei Mujin Biotechnology Co.,Ltd | +86 13288715578 +8613288715578 | sales@hbmojin.com | China | 12809 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20235 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718 +86-13336195806 | sales@capot.com | China | 29730 | 60 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-371-+86-371-66670886 | info@dakenam.com | China | 19805 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21628 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29858 | 58 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28172 | 58 |
| Xiamen AmoyChem Co., Ltd | +86-86-5926051114 +8615060885618 | sales@amoychem.com | China | 6383 | 58 |
View Lastest Price from Naphthalene-2-sulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2025-04-23 | Naphthalene-2-sulfonic acid
120-18-3
|
US $9.90 / KG | 1KG | 99% | 5tons | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2025-03-21 | Naphthalene-2-sulfonic acid
120-18-3
|
US $0.00 / KG | 1KG | 99% | 50000KG/month | Hebei Mujin Biotechnology Co.,Ltd | |
 |
2025-03-07 | Naphthalene-2-sulfonic acid
120-18-3
|
US $20.00-10.00 / kg | 25kg | 99% | 100T | Hebei Yanxi Chemical Co., Ltd. |
-
- Naphthalene-2-sulfonic acid
120-18-3
- US $9.90 / KG
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Naphthalene-2-sulfonic acid
120-18-3
- US $0.00 / KG
- 99%
- Hebei Mujin Biotechnology Co.,Ltd
-
- Naphthalene-2-sulfonic acid
120-18-3
- US $20.00-10.00 / kg
- 99%
- Hebei Yanxi Chemical Co., Ltd.