6-Amino-1-naphthalenesulfonic acid
- CAS No.
- 81-05-0
- Chemical Name:
- 6-Amino-1-naphthalenesulfonic acid
- Synonyms
- D ACID;DAHL'S ACID;2-Naphthylamine-5-sulfonicaci;2-NAPHTHYLAMINE-5-SULFONIC ACID;6-Aminonaphthalene-1-sulfonicaci;2-AMINO-5-NAPHTHALENESULFONIC ACID;2-AMINONAPHTHALENE-5-SULFONIC ACID;BETA-NAPHTHYLAMINE-5-SULFONIC ACID;6-aminonaphthalene-1-sulfonic acid;6-AMINO-1-NAPHTHALENESULFONIC ACID
- CBNumber:
- CB3782572
- Molecular Formula:
- C10H9NO3S
- Molecular Weight:
- 223.25
- MDL Number:
- MFCD00035724
- MOL File:
- 81-05-0.mol
- MSDS File:
- SDS
| Density | 1.3588 (rough estimate) |
|---|---|
| refractive index | 1.6500 (estimate) |
| storage temp. | under inert gas (nitrogen or Argon) at 2–8 °C |
| pka | -0.33±0.40(Predicted) |
| form | powder to crystal |
| color | White to Light yellow to Light red |
| Water Solubility | 0.33g/L(20 ºC) |
| Merck | 14,6407 |
| CAS DataBase Reference | 81-05-0(CAS DataBase Reference) |
| FDA UNII | Y4SEI692W3 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319 | |||||||||
| Precautionary statements | P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313 | |||||||||
| RIDADR | 1759 | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 29269095 | |||||||||
| NFPA 704 |
|
6-Amino-1-naphthalenesulfonic acid price More Price(32)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TCI Chemical | A0347 | 6-Amino-1-naphthalenesulfonic Acid >97.0%(HPLC)(T) | 81-05-0 | 25g | $62 | 2026-04-30 | Buy |
| TCI Chemical | A0347 | 6-Amino-1-naphthalenesulfonic Acid >97.0%(HPLC)(T) | 81-05-0 | 500g | $516 | 2026-04-30 | Buy |
| Biosynth | AAA08105 | 2-Aminonaphthalene-5-sulfonic acid | 81-05-0 | 25g | $312.5 | 2026-06-04 | Buy |
| Activate Scientific | AS140708 | 6-Amino-1-naphthalenesulfonic Acid 95% | 81-05-0 | 5g | $20 | 2026-06-04 | Buy |
| Activate Scientific | AS140708 | 6-Amino-1-naphthalenesulfonic Acid 95% | 81-05-0 | 25g | $69 | 2026-06-04 | Buy |
6-Amino-1-naphthalenesulfonic acid Chemical Properties, Uses, Production
Chemical Properties
2-Aminonaphthalene-5-sulfonic acid [81-05-0]. (6-aminonaphthalene-1-sulfonic acid), Dahl’s acid, Dressel acid, D acid, C10H9NO3S, Mr 223.24, crystallizes from water as needles although only 0.4 % soluble at 100℃. The sodium, calcium, and barium salts are moderately soluble in water. Bromination in acetic acid gives the 1-bromo derivative. Sulfonation with oleum gives a mixture of 2-aminonaphthalene-5,7-disulfonic acid together with some 1,5-disulfonic acid. Fusion with potassium hydroxide at 260℃ yields 6-amino-1-naphthol.
Uses
6-Amino-1-naphthalenesulfonic acid is used as a dye intermediate in the production of acid dyes.
Production Methods
Tobias acid is added to a mixture of sulfuric acid and oleum, and the reaction is completed by stirring for 12 h at 25℃. The resulting sulfonation mass, containing mainly 2-aminonaphthalene-1,5-disulfonic acid, is poured into water and heated at 105℃ for 3 h to desulfonate and precipitate the product which, after cooling, is filtered off; the yield is 95 %.
6-Amino-1-naphthalenesulfonic acid Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Wuhan Chemwish Technology Co., Ltd | 86-027-67849912 | sales@chemwish.com | China | 35884 | 56 |
| Capot Chemical Co., Ltd | +86 (0) 571 85 58 67 18 | China | 18187 | 66 | |
| Shanghai Sinch Parmaceuticals Tech. Co. Ltd. | +86-21-54098501 | sales@sinch.com.cn | China | 11592 | 64 |
| Shandong Xiya Chemical Co., Ltd | 13355009207 13355009207 | 3007715519@qq.com | China | 18722 | 57 |
| Syntechem Co.,Ltd | info@syntechem.com | China | 12973 | 57 | |
| China Langchem Inc. | 0086-21-58956006 | China | 7798 | 57 |
View Latest Price from 6-Amino-1-naphthalenesulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-08-20 | 6-Amino-1-naphthalenesulfonic acid
81-05-0
|
$1.10 | 1g | 99.00% | 100 Tons Min | Dideu Industries Group Limited | |
 |
2025-04-15 | 6-Amino-1-naphthalenesulfonic acid
81-05-0
|
$45.00 | 1kg | 99% | 5000kg/week | Hebei Zhuanglai Chemical Trading Co.,Ltd | |
 |
2020-02-26 | 6-Amino-1-naphthalenesulfonic Acid
81-05-0
|
1KG | 99.0%+ | 100 tons | Shaanxi Dideu Medichem Co. Ltd |
-
- 6-Amino-1-naphthalenesulfonic acid
81-05-0
- $1.10
- 99.00%
- Dideu Industries Group Limited
-
- 6-Amino-1-naphthalenesulfonic acid
81-05-0
- $45.00
- 99%
- Hebei Zhuanglai Chemical Trading Co.,Ltd
-
- 6-Amino-1-naphthalenesulfonic Acid
81-05-0
- 99.0%+
- Shaanxi Dideu Medichem Co. Ltd
