Disodium 3-hydroxy-4-(4-nitrophenyl)azonaphthalene-2,7-disulphonate CAS 7143-21-7
| CAS No. | 7143-21-7 |
| Molecular Formula | C16H9N3O9S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Disodium 3-hydroxy-4-(4-nitrophenyl)azonaphthalene-2,7-disulphonate is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Disodium 3-hydroxy-4-(4-nitrophenyl)azonaphthalene-2,7-disulphonate (CAS 7143-21-7) is a high-purity analytical reference standard with the molecular formula C16H9N3O9S2Na and a molecular weight of 474.37 g/mol.
Structurally, Disodium 3-hydroxy-4-(4-nitrophenyl)azonaphthalene-2,7-disulphonate (C16H9N3O9S2Na) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 474.37 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C16H9N3O9S2 2*Na |
| Molecular Weight | 474.37 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Disodium Standards
- Disodium hydrogen phosphate dihydrate (CAS 10028-24-7)
- Disodium terephthalate (CAS 10028-70-3)
- Disodium Deuterium Phosphate (CAS 107632-22-4)
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- DIsodium phenyl phosphate hydrate (CAS 1260375-37-8)
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- MLN-4760 disodium salt (CAS 1315337-39-3)
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Recommended Standards
- 4-Hydroxy-1-phenyl-1h-pyrazole-3-carbohydrazide (CAS 956781-13-8)
- H-4-Cyano-Phe-OH (CAS 167479-78-9)
- Ethyl 1-(3-(1,1-dioxido-3-oxobenzo[d]isothiazol-2(3H)-yl)propanoyl)piperidine-4-carboxylate (CAS 899995-80-3)
- 3-(4-Chlorophenyl)-5-(furan-2-yl)-4,5-dihydro-1h-pyrazole-1-carbothioamide (CAS 686725-76-8)
- 2,7-Dichloro-9H-carbazole (CAS 102871-58-9)
- (3-(Hydroxymethyl)piperidin-1-yl)(4-methylthiazol-5-yl)methanone (CAS 1155632-04-4)
- (1S,2S)-2-methyl-4-oxocyclohexane-1-carboxylic acid (CAS 1931946-13-2)
- 2-Azaspiro[4.4]Nonan-7-ol hydrochloride (CAS 2306272-60-4)
- 5-((4-Bromobenzyl)sulfonyl)-3-chloro-1,2,4-thiadiazole (CAS 494763-24-5)
- Tirzepatide Impurity 14 (CAS CATO-C4X-324014)
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