Others Impurity 85 CAS 731016-26-5
| CAS No. | 731016-26-5 |
| Molecular Formula | C20H30O13 |
| Molecular Weight | 478.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Others Impurity 85 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.
CATO supplies Others Impurity 85 (CAS 731016-26-5), a pharmacopoeial impurity reference standard (molecular formula C20H30O13, MW 478.44 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Others Impurity 85 (C20H30O13) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 478.44 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.
Physical & Chemical Properties
| Molecular Formula | C20H30O13 |
| Molecular Weight | 478.44 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
Related Others Standards
Recommended Standards
- N-(2-Bromophenyl)-2-((3-ethyl-4-oxo-3,4,5,6,7,8-hexahydrobenzo[4,5]thieno[2,3-d]pyrimidin-2-yl)thio)acetamide (CAS 577960-68-0)
- Gemcitabine Impurity 34 (CAS CATO-C4X-137234)
- Apalutamide Impurity 72 (CAS 1950587-19-5)
- Difamilast Impurity 11 (CAS 2103190-98-1)
- Ionone Impurity 1 (CAS 36340-49-5)
- Posaconazole impurity 225 (CAS CATO-C4X-1208225)
- Isavuconazole Impurity 106 (CAS 150803-17-1)
- trans-5-Boc-amino-cyclohex-3-enecarboxylic acid methyl ester (CAS 2407051-40-3)
- methyl(2-phenylpropan-2-yl)amine hydrochloride (CAS 1909306-64-4)
- N-(2-Bromo-4-methylphenyl)-2-((4-ethyl-5-(furan-2-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 575469-28-2)
- Dimethyl 2-isocyanatoterephthalate (CAS 179114-94-4)
- (S)-3-Amino-4-(benzo[b]thiophen-3-yl)butanoic acid (CAS 270063-44-0)
- 4-Tert-butyl-N-piperidin-4-ylbenzamide (CAS 75484-44-5)
- HA Peptide (CAS 92000-76-5)
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