Disodium Rhodizonate CAS 523-21-7
| CAS No. | 523-21-7 |
| Molecular Formula | C6O6 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Disodium Rhodizonate (CAS 523-21-7), molecular formula C6O6Na and molecular weight 191.05 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Disodium Rhodizonate (C6O6Na) is characterized by a carbohydrate-derived structure. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C6O6 2*Na |
| Molecular Weight | 191.05 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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 |
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Recommended Standards
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- Methyl 6-mercapto-4-methylnicotinate (CAS 1355180-07-2)
- 1-(3,4-Dimethylphenyl)-2-((2-hydroxyethyl)thio)ethan-1-one (CAS 1157217-99-6)
- [(4-Ethoxy-3-methoxyphenyl)methyl](methyl)amine (CAS 709649-58-1)
- 5-Bromoquinazoline-2,4-diamine (CAS 119584-75-7)
- Nicorandil Impurity 33 (CAS CATO-C4X-190733)
- 3-Bromo-4,8-dimethylquinolin-2(1H)-one (CAS 41968-62-1)
- N-(2-chlorophenyl)-4-(4-(3,4-dichlorophenyl)thiazol-2-yl)benzamide (CAS 338408-22-3)
- Serpent Peptide (CAS 823202-99-9)
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