3-hydroxy-4-[(2-Methoxy-5-methyl-4-sulfophenyl)azo]-2,7-Naphthalenedisulfonic acid trisodium salt CAS 61660-30-8
| CAS No. | 61660-30-8 |
| Molecular Formula | C18H13N2O11S3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-hydroxy-4-[(2-Methoxy-5-methyl-4-sulfophenyl)azo]-2,7-Naphthalenedisulfonic acid trisodium salt.
3-hydroxy-4-[(2-Methoxy-5-methyl-4-sulfophenyl)azo]-2,7-Naphthalenedisulfonic acid trisodium salt (CAS 61660-30-8), molecular formula C18H13N2O11S3Na and molecular weight 552.48 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C18H13N2O11S3Na, 3-hydroxy-4-[(2-Methoxy-5-methyl-4-sulfophenyl)azo]-2,7-Naphthalenedisulfonic acid trisodium salt contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 552.48 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C18H13N2O11S3 3*Na |
| Molecular Weight | 552.48 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 13.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 3 |
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Recommended Standards
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- 3-[2-(3-methylphenyl)pyrrolidine-1-carbonyl]-5-(propan-2-yl)-1,2-oxazole (CAS 1031585-85-9)
- 5-Oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulen-2-yl trifluoromethanesulfonate (CAS 154122-33-5)
- 2-(Hydroxymethyl)-3-iodo-5-methoxypyridin-4(1H)-one (CAS 1190198-17-4)
- 2-[3-(2-Dimethylamino-5-trifluoromethyl-pyridin-3-yl)-phenoxy]-propionic acid ethyl ester (CAS 1311278-21-3)
- Peptide Impurity 04 (CAS 2913424-91-4)
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