ChemicalBook >> CAS DataBase List >>1-Amino-2-naphthalenesulfonic acid
1-Amino-2-naphthalenesulfonic acid
- CAS No.
- 81-06-1
- Chemical Name:
- 1-Amino-2-naphthalenesulfonic acid
- Synonyms
- O-NAPHTHIONIC ACID;ONZWNZGVZFLMNZ-UHFFFAOYSA-N;1,2-Naphthylaminesulfonic acid;1-NAPHTHYLAMINE-2-SULFONIC ACID;α-Naphthylamine-2-sulfonic acid;1-amino-2-naphthalenesulfonicaci;1-aminonaphthalene-2-sulfonicaci;1-aminonaphthalene-2-sulfonic acid;1-Amino-2-naphthalenesulfonic acid;1-aminonaphthalene-2-sulphonic acid
- CBNumber:
- CB8781833
- Molecular Formula:
- C10H9NO3S
- Molecular Weight:
- 223.25
- MDL Number:
- MFCD00021545
- MOL File:
- 81-06-1.mol
- MSDS File:
- SDS
Last updated:2026-09-12 18:55:52
| Density | 1.3588 (rough estimate) |
|---|---|
| refractive index | 1.6500 (estimate) |
| pka | pK1: 1.71 (25°C) |
| Water Solubility | 4.1g/L(20 ºC) |
| FDA UNII | N3P4M2L23X |
| EPA Substance Registry System | 2-Naphthalenesulfonic acid, 1-amino- (81-06-1) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|---|---|
| Signal word | Warning |
| Hazard statements | H302-H315-H319-H335 |
| Precautionary statements | P280-P305+P351+P338 |
| TSCA | TSCA listed |
1-Amino-2-naphthalenesulfonic acid price
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | S442585 | 1-AMINO-2-NAPHTHALENESULFONIC ACID AldrichCPR | 81-06-1 | 1 unit | $197 | 2026-04-30 | Buy |
| Sigma-Aldrich | S442585 | 1-AMINO-2-NAPHTHALENESULFONIC ACID AldrichCPR | 81-06-1 | 1G | $179 | 2024-03-01 | Buy |
| AHH | MT-19361 | 1-Naphthylamine-2-sulfonic acid 97% | 250g | $298 | 2026-05-26 | Buy | |
| American Custom Chemicals Corporation | CHM0006479 | 1-AMINO-2-NAPHTHALENESULFONICACID 95.00% | 81-06-1 | 1G | $638.1 | 2021-12-16 | Buy |
| American Custom Chemicals Corporation | CHM0006479 | 1-AMINO-2-NAPHTHALENESULFONICACID 95.00% | 81-06-1 | 5G | $911.99 | 2021-12-16 | Buy |
1-Amino-2-naphthalenesulfonic acid Chemical Properties, Uses, Production
Chemical Properties
1-Aminonaphthalene-2-sulfonic acid [81- 06-1]. ortho-naphthionic acid, C10H9NO3S, Mr 223.24, mp 262 – 265℃ (decomp.), is sparingly soluble in cold water but dissolves in hot water to give a 3 % solution. The sodium salt is more readily soluble in water (1.7 % at 20℃ and 10 % at 100℃). The calcium salt is similarly soluble, but the barium salt is almost insoluble.
Production Methods
1-Naphthylamine can be sulfonated by heating with sulfuric acid at 180 – 185℃, but the transient intermediate naphthalene-1-sulfamic acid is best prepared from 1-aminonaphthalene-4-sulfonic acid (naphthionic acid). When sodium naphthionate is heated in a solvent such as o-dichlorobenzene or xylene at 225℃, thermal rearrangement occurs to give the 1,2-isomer in high yield.
1-Amino-2-naphthalenesulfonic acid Preparation Products And Raw materials
Global Suppliers ( 28)
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| RYSS TECH LTD | 400-188-0725 +86 21 34310725 13611771617 | China | 1999 | 57 | |
| Alfa Chemistry | +1-5166625404; | Info@alfa-chemistry.com | United States | 20000 | 58 |
| Dideu Industries Group Limited | +8617392712697 | 1022@dideu.com | China | 29090 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +86-189 4982 3763 | sales@tnjchem.com | China | 34526 | 58 |
| Baoji Didu Pharmaceutical and Chemical Co., Ltd | 029-81145305 17791533577 | 1021@dideu.com | China | 9997 | 58 |
| Guangdong Wengjiang Chemical Reagent Co.,Ltd. | 0751-2815983 13927872582 | 3008325437@qq.com | China | 9824 | 58 |
| Guangdong Yuanfeng Chemical Reagent Co., Ltd | 0751-2829979 13318584237 | 3929169616@qq.com | China | 9991 | 58 |
| Guangdong Yuanfeng Chemical Reagent Co., Ltd | 0751-2829979 13376591640 | 3680032499@qq.com | China | 9990 | 58 |
| Guangdong Yuanfeng Chemical Reagent Co., Ltd. | 0751-2829979 13318593351 | 3971126791@qq.com | China | 9996 | 58 |
| DAYANG CHEM (HANGZHOU) CO.,LTD | +86-88938639 +86-17705817739 | info@dycnchem.com | China | 53589 | 58 |
View Latest Price from 1-Amino-2-naphthalenesulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-08-20 | 1-AMINO-2-NAPHTHALENESULFONIC ACID
81-06-1
|
$1.10 | 1g | 99.00% | 100 Tons Min | Dideu Industries Group Limited | |
 |
2020-02-26 | 1-aminonaphthalene-2-sulphonic acid
81-06-1
|
1KG | 99.0%+ | 100 tons | Shaanxi Dideu Medichem Co. Ltd |
-
- 1-AMINO-2-NAPHTHALENESULFONIC ACID
81-06-1
- $1.10
- 99.00%
- Dideu Industries Group Limited
-
- 1-aminonaphthalene-2-sulphonic acid
81-06-1
- 99.0%+
- Shaanxi Dideu Medichem Co. Ltd
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1-Amino-2-naphthalenesulfonic acid
81-06-1
1981-06-1
