1-Amino-2-naphthol-4-sulfonic acid
- CAS No.
- 116-63-2
- Chemical Name:
- 1-Amino-2-naphthol-4-sulfonic acid
- Synonyms
- 1,2,4-acid;TIMTEC-BB SBB008870;1-Amino-2-naphthol-4;LABOTEST-BB LT00454379;3-Hydroxynaphthionic acid;1-amino-4-sulfo-2-naphthol;1-Amino-2-naphthol-4-sulfonic;1-AMINO-2-NAPHTH-4-SULFONIC AC;Amino-2-Naphthol-4-SulfonicAcid;1-Amino-2-naphthol-4-sulfonate.
- CBNumber:
- CB5345948
- Molecular Formula:
- C10H9NO4S
- Molecular Weight:
- 239.25
- MOL File:
- 116-63-2.mol
- MSDS File:
- SDS
- Modify Date:
- 2023/11/6 14:44:11
| Melting point | 290 °C (dec.)(lit.) |
|---|---|
| Density | 1.4338 (rough estimate) |
| refractive index | 1.6500 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | DMSO (Slightly), Methanol (Slightly) |
| pka | -0.49±0.40(Predicted) |
| form | Powder |
| color | White to light pink |
| Water Solubility | insoluble |
| Merck | 14,454 |
| BRN | 2697469 |
| Stability | Stable. Incompatible with strong bases, acid chlorides, acid anhydrides, strong oxidizing agents. |
| InChIKey | RXCMFQDTWCCLBL-UHFFFAOYSA-N |
| CAS DataBase Reference | 116-63-2(CAS DataBase Reference) |
| NIST Chemistry Reference | 1-Naphthalenesulfonic acid,4-amino-3-hydroxy-(116-63-2) |
| EPA Substance Registry System | 1-Naphthalenesulfonic acid, 4-amino-3-hydroxy- (116-63-2) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 37/39-26 | |||||||||
| RIDADR | 3265 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | QK1292000 | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | IRRITANT | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 29222100 | |||||||||
| NFPA 704 |
|
1-Amino-2-naphthol-4-sulfonic acid price More Price(21)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 398969 | 4-Amino-3-hydroxy-1-naphthalenesulfonic acid ACS reagent, ≥90% | 116-63-2 | 25G | ₹3777.93 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 1.00099 | 1-Amino-2-hydroxy-4-naphthalenesulfonic acid for determination of phosphate | 116-63-2 | 25G | ₹8039.99 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 1.00099 | 1-Amino-2-hydroxy-4-naphthalenesulfonic acid for determination of phosphate | 116-63-2 | 100G | ₹32430 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 08751 | 4-Amino-3-hydroxy-1-naphthalenesulfonic acid for spectrophotometric det. of Si, ≥90.0% (CHN) | 116-63-2 | 25G | ₹4871.25 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 08751 | 4-Amino-3-hydroxy-1-naphthalenesulfonic acid for spectrophotometric det. of Si, ≥90.0% (CHN) | 116-63-2 | 100G | ₹16324.1 | 2022-06-14 | Buy |
1-Amino-2-naphthol-4-sulfonic acid Chemical Properties,Uses,Production
Chemical Properties
1-Amino-2-hydroxynaphthalene-4-sulfonic acid [116-63-2]. (4-amino-3-hydroxynaphthalene-1-sulfonic acid), B€oniger acid, C10H9NO4S, Mr 239.2, is obtained as white or gray needles of the hemihydrate, which is only sparingly soluble in hot water. The alkali-metal salts are soluble in water, but the solutions slowly oxidize in air. Oxidation with nitric acid gives 1,2- naphthoquinone-4-sulfonic acid.
Uses
1-Amino-2-naphthol-4-sulfonic acid can be used in determination of phosphate.
Production Methods
2-Naphthol is dissolved in dilute aqueous sodium hydroxide and precipitated in finely divided form by addition of sulfuric acid at 5℃. Sodium nitrite solution is added to the slightly alkaline suspension, followed by sulfuric acid to effectthe nitrosation while the temperature is held at 5 – 8℃. The suspension of 1-nitroso2-naphthol is neutralized with aqueous sodium hydroxide; a solution of sodium bisulfite is then added. The temperature is allowed to rise to 20℃, and the soluble bisulfite addition complex is formed. Excess sulfuric acid is then added and the temperature is raised to 40℃, whereupon reductive rearrangement takes place and the product slowly crystallizes at 50℃. Filtration and washing give the product as a 25 % paste in 80 % yield. All plant items and reactants must be free from iron to avoid complex formation.
Purification Methods
Purify it by warming 15g of the acid, 150g of NaHSO3 and 5g of Na2SO3(anhydrous) with 1L of water to ca 90o, shaking until most of the solid had dissolved, then filtering hot. The precipitate obtained by adding 10mL of conc HCl to the cooled filtrate is collected, washed with 95% EtOH until the washings are colourless, and is dried under vacuum over CaCl2. It is stored in a dark-coloured bottle, in the cold [Chanley et al. J Am Chem Soc 74 4347 1952]. [Beilstein 14 IV 2825.]
1-Amino-2-naphthol-4-sulfonic acid Preparation Products And Raw materials
Raw materials
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