Sodium Picosulfate EP Impurity A CAS 32500-19-9
| CAS No. | 32500-19-9 |
| Molecular Formula | C18H14NO5S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Sodium Picosulfate EP Impurity A 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.
CATO supplies Sodium Picosulfate EP Impurity A (CAS 32500-19-9), a pharmacopoeial impurity reference standard (molecular formula C18H14NO5SNa, MW 379.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Sodium Picosulfate EP Impurity A (C18H14NO5SNa) 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 12.5, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 379.36 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Sodium Picosulfate EP Impurity A meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H14NO5S Na |
| Molecular Weight | 379.36 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Sodium Standards
- Picosulfate Sodium (CAS 10040-45-6)
- Picosulfate Impurity 12 (CAS 105745-58-2)
- Picosulfate Impurity 17 (CAS 109810-81-3)
- Sodium Picosulfate Impurity 11 (CAS 1121-60-4)
- Picosulfate Impurity 16 (CAS 13004-51-8)
- Sodium Picosulfate Monohydrate (CAS 1307301-38-7)
- Picosulfate impurity 23 (CAS 158839-52-2)
- Picosulfate Impurity 15 (CAS 16985-07-2)
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- (3-Bromo-5-ethoxypyridin-4-yl)boronic acid (CAS 612845-46-2)
- 5,6-Dichloro-1H-indene-1,3(2H)-dione (CAS 93296-41-4)
- (R)-1-(3-bromo-5-methylphenyl)-2,2,2-trifluoroethan-1-amine (CAS 1270055-70-3)
- (Leu31,Pro3?)-Neuropeptide Y (human, rat) trifluoroacetate salt (CAS 132699-73-1)
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