Sodium 4-amino-3-hydroxynaphthalene-2,7-disulfonate CAS 42579-07-7
| CAS No. | 42579-07-7 |
| Molecular Formula | C10H7NO7S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Sodium 4-amino-3-hydroxynaphthalene-2,7-disulfonate (CAS 42579-07-7), molecular formula C10H7NO7S2Na and molecular weight 340.28 g/mol, is a CATO reference standard with documented purity and traceability.
Sodium 4-amino-3-hydroxynaphthalene-2,7-disulfonate (C10H7NO7S2Na) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C10H7NO7S2 2*Na |
| Molecular Weight | 340.28 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
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Recommended Standards
- rel-2,2'-[(1R,2R)-1,2-Diamino-1,2-ethanediyl]bis[phenol] (CAS 119386-71-9)
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- Methyl s-(tert-butyl)homocysteinate (CAS 1501995-23-8)
- N,N-Diethyl-3-phenylacrylamide (CAS 3680-04-4)
- 1-(2,6,6-Trimethyltetrahydro-2H-pyran-2-yl)pent-1-yn-3-ol (CAS 127897-42-1)
- Verubecestat (TFA) (CAS 2095432-65-6)
- Tert-butyl (2-hydroxy-3-methylbutyl)carbamate (CAS 1510824-23-3)
- Diltiazem EP Impurity F HCl (CAS 75472-91-2(free base))
- Pantoprazole Impurity 49 (CAS 1261238-06-5)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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