Policresulen Impurity 20 Disodium Salt CAS 90111-56-1 (free acid)
| CAS No. | 90111-56-1 (free acid) |
| Molecular Formula | C8H6O6S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Policresulen Impurity 20 Disodium Salt (C8H6O6SNa) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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 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).
CATO supplies Policresulen Impurity 20 Disodium Salt (CAS 90111-56-1 (free acid)), a pharmacopoeial impurity reference standard (molecular formula C8H6O6SNa, MW 253.18 g/mol) used for the identification and quantification of trace impurities in APIs.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C8H6O6S 2*Na |
| Molecular Weight | 253.18 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Sulfur Atoms | 1 |
Related Policresulen Standards
- Policresulen(50% Aqueous Solution) (CAS 101418-00-2)
- Policresulen impurity 21 (CAS 102014-39-1)
- Policresulen Impurity N1 (CAS 15534-74-4)
- Policresulen Impurity 16 (CAS 17011-26-6)
- Policresulen Impurity 6 (CAS 17688-83-4)
- Policresulen Impurity N11 (CAS 3077-71-2)
- Policresulen Impurity 14 (CAS 41481-17-8)
- Policresulen Impurity 19 Sodium Salt (CAS 41481-17-8 (free acid))
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Why CATO?
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