5-Amino-1-naphthalenesulfonic acid
- CAS No.
- 84-89-9
- Chemical Name:
- 5-Amino-1-naphthalenesulfonic acid
- Synonyms
- 5-AMINONAPHTHALENE-1-SULFONIC ACID;laurentacid;Laurens Acid;LAURENTS ACID;LAURENT'S ACID;1,5-AMINO ACID;LABOTEST-BB LT01138428;5-SULFO-1-NAPHTHYLAMINE;1-AMINO-5-SULFONAPHTHALENE;Laurent Acid(1.5 cleves acid)
- CBNumber:
- CB7713334
- Molecular Formula:
- C10H9NO3S
- Molecular Weight:
- 223.25
- MDL Number:
- MFCD00014315
- MOL File:
- 84-89-9.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | >300°C |
|---|---|
| Boiling point | 220°C (rough estimate) |
| Density | 1.3588 (rough estimate) |
| refractive index | 1.6500 (estimate) |
| solubility | Aqueous Base (Slightly), DMSO (Slightly) |
| form | powder to crystal |
| pka | pK1: 3.69 (25°C) |
| color | Purple to Dark purple to Dark red |
| Water Solubility | Soluble in hot water. |
| Merck | 14,6404 |
| BRN | 2214149 |
| InChI | 1S/C10H9NO3S/c11-9-5-1-4-8-7(9)3-2-6-10(8)15(12,13)14/h1-6H,11H2,(H,12,13,14) |
| InChIKey | DQNAQOYOSRJXFZ-UHFFFAOYSA-N |
| SMILES | Nc1cccc2c(cccc12)S(O)(=O)=O |
| CAS DataBase Reference | 84-89-9(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | W70WC365OD |
| EPA Substance Registry System | 1-Naphthalenesulfonic acid, 5-amino- (84-89-9) |
| UNSPSC Code | 12352100 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS07 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H335-H312-H314-H332-H315-H319 | |||||||||
| Precautionary statements | P280g-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P280-P305+P351+P338-P310 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | C | |||||||||
| Risk Statements | 20/21/22-34 | |||||||||
| Safety Statements | 26-36/37/39-45 | |||||||||
| RIDADR | UN 2585 8/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | QK1270500 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 2921.45.2000 | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | III | |||||||||
| Storage Class | 8B - Non-combustible corrosive hazardous materials | |||||||||
| Hazard Classifications | Acute Tox. 4 Dermal Skin Corr. 1B |
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| REACH Registrations | Active | |||||||||
| Limited Quantities | 5.0 kg (11 lbs) (solid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L) | |||||||||
| NFPA 704 |
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5-Amino-1-naphthalenesulfonic acid price More Price(24)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TCI Chemical | A0345 | 5-Amino-1-naphthalenesulfonic Acid >98.0%(T) | 84-89-9 | 25g | $141 | 2026-04-30 | Buy |
| AK Scientific | T952 | 1-Aminonaphthalene-5-sulfonic acid 98%(HPLC) | 84-89-9 | 100mg | $41 | 2026-06-04 | Buy |
| AK Scientific | T952 | 1-Aminonaphthalene-5-sulfonic acid 98%(HPLC) | 84-89-9 | 1g | $93 | 2026-06-04 | Buy |
| AK Scientific | T952 | 1-Aminonaphthalene-5-sulfonic acid 98%(HPLC) | 84-89-9 | 5g | $276 | 2026-06-04 | Buy |
| aablocks | AA003M9X | 5-Aminonaphthalene-1-sulfonic acid ≥90% | 84-89-9 | 25g | $15 | 2026-05-28 | Buy |
5-Amino-1-naphthalenesulfonic acid Chemical Properties, Uses, Production
Chemical Properties
1-Aminonaphthalene-5-sulfonic acid [84- 89-9]. (5-aminonaphthalene-1-sulfonic acid), Laurent’s acid, L acid, Purpurin acid, C10H9NO3S, Mr 223.24, crystallizes from hot water as needles of the monohydrate. The alkalimetal salts are all readily soluble in water. Bromination yields the 2,4-dibromo derivative, vigorous nitration gives 2,4-dinitro-1- hydroxynaphthalene, and sulfonation results in 1-aminonaphthalene-2,5,7-trisulfonic acid. 1- Hydroxynaphthalene-5-sulfonic acid is obtained by heating 104 with aqueous bisulfite (reverseBucherer reaction) or via the diazo compound. Caustic fusion produces 5-amino-1-hydroxynaphthalene. Coupling with diazo compounds takes place in the 2-position.
Uses
Intermediate of dyestuff
Uses
5-Aminonaphthalene-1-sulfonic acid is an deriva- tizing agents in the precolumn derivatization of some chiral phenoxy acid. Cu(II) based on a dansyl derivative was synthesized with 29.2% overall yield by a seven-step synthetic procedure from the readily available starting material 5-aminonaphthalene-1-sulfonic acid.
Definition
ChEBI: 5-Amino-1-naphthalenesulfonic acid is a naphthalenesulfonic acid.
Production Methods
Laurent’s acid is coproduced with Peri acid as the minor component of a 5:2 isolated product ratio.
Purification Methods
Crystallise the acid under nitrogen from boiling water and dry it in a steam oven [Bryson Trans Faraday Soc 47 522, 527 1951]. [Beilstein 14 IV 2800.]
5-Amino-1-naphthalenesulfonic acid Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hubei Norna Technology Limited Company | 59209883 17386169806 | service@nornachem.com | China | 4829 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Shanghai Hanhong Scientific Co.,Ltd. | 021-54306202 13764082696 | info@hanhongsci.com | China | 42917 | 64 |
| Chemsky（shanghai）International Co.,Ltd. | 021-50135380 | shchemsky@sina.com | China | 32273 | 50 |
| XiaoGan ShenYuan ChemPharm co,ltd | 15527621225; 15527621225 | 1791901229@qq.com | China | 6741 | 52 |
| Shandong Xiya Chemical Co., Ltd | 13355009207 13355009207 | 3007715519@qq.com | China | 18722 | 57 |
View Latest Price from 5-Amino-1-naphthalenesulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-17 | 5-Amino-1-naphthalenesulfonic acid
84-89-9
|
1KG | 98%min | 30tons/month | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-05-22 | 5-Amino-1-naphthalenesulfonic acid
84-89-9
|
1G/KG | 99% | 10000000KG | Anhuyan (Hainan) Biotechnology Co., LTD | ||
 |
2026-05-22 | 5-Amino-1-naphthalenesulfonic acid
84-89-9
|
1G/KG | 99% | 100MT | Anhuyan (Hainan) Biotechnology Co., LTD |
-
- 5-Amino-1-naphthalenesulfonic acid
84-89-9
- $0.00
- 98%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- 5-Amino-1-naphthalenesulfonic acid
84-89-9
- $0.00
- 99%
- Anhuyan (Hainan) Biotechnology Co., LTD
-
- 5-Amino-1-naphthalenesulfonic acid
84-89-9
- $0.00
- 99%
- Anhuyan (Hainan) Biotechnology Co., LTD
