8-Amino-4-hydroxynaphthalene-2-sulfonic acid CAS 489-78-1
| CAS No. | 489-78-1 |
| Molecular Formula | C10H9NO4S |
| Molecular Weight | 239.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
8-Amino-4-hydroxynaphthalene-2-sulfonic acid (CAS 489-78-1) is a high-purity analytical reference standard with the molecular formula C10H9NO4S and a molecular weight of 239.25 g/mol.
Structurally, 8-Amino-4-hydroxynaphthalene-2-sulfonic acid (C10H9NO4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 239.25 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 8-Amino-4-hydroxynaphthalene-2-sulfonic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C10H9NO4S |
| Molecular Weight | 239.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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- 5-(Benzyloxy)-6-bromo-1H-indazole (CAS 1206800-86-3)
- 2-Bromo-N-(6-methoxybenzo[d]thiazol-2-yl)acetamide (CAS 98946-80-6)
- 3-Chloro-N,N-dipropyl-5-(trifluoromethyl)-2-pyridinamine (CAS 1220029-34-4)
- (2Z)-3-[(2,3-dimethylphenyl)carbamoyl]prop-2-enoic Acid (CAS 198220-51-8)
- Tirzepatide Impurity 45 (CAS CATO-C4X-324045)
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