Aspirin Impurity 11 CAS 85531-16-4
| CAS No. | 85531-16-4 |
| Molecular Formula | C23H16O8 |
| Molecular Weight | 420.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Aspirin Impurity 11 is closely related to a flavonoid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Aspirin Impurity 11 (CAS 85531-16-4) is a certified pharmaceutical impurity reference standard with the molecular formula C23H16O8 and a molecular weight of 420.37 g/mol.
Structurally, Aspirin Impurity 11 (C23H16O8) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 16.0, corresponding to approximately 16 ring(s) or double-bond equivalent(s). With a molecular weight of 420.37 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures Aspirin Impurity 11 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C23H16O8 |
| Molecular Weight | 420.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
Related Aspirin Standards
Recommended Standards
- NHPI-PEG2-C2-NHS ester (CAS 2101206-31-7)
- Z-Gly-Gly-Gly-OSu (CAS 138346-57-3)
- N-[3,5-Bis(trifluoromethyl)phenyl]-N'-[(1S,2R)-2,3-dihydro-2-hydroxy-1H-inden-1-yl]thiourea (CAS 949480-57-3)
- (3-(2-((Tert-butyldiphenylsilyl)oxy)ethoxy)phenyl)boronic acid (CAS 227306-39-0)
- Ketoprofen Impurity 66 (CAS CATO-C4X-147166)
- Cyclophosphamide Impurity 47 (CAS CATO-C4X-230647)
- Enzalutamide Impurity 22 (CAS 392-09-6)
- 5-Bromo-2H-1,3-benzodioxol-4-ol (CAS 82299-36-3)
- n-(4-Fluoro-3-nitrophenyl)-3,4-dihydro-2h-1,5-benzodioxepine-7-sulfonamide (CAS 790681-73-1)
- Ethyl 4-oxo-3-(propionyloxy)-4H-pyran-2-carboxylate (CAS 2061980-23-0)
- tert-Butyl 4-butylpiperidine-1-carboxylate (CAS 1160592-00-6)
- 5-Nitro-4-phenoxycinnoline (CAS 854891-67-1)
- (2E)-3-(2,4-Dichlorophenyl)-1-(2,4-dimethoxyphenyl)prop-2-en-1-one (CAS 171365-99-4)
- Vialox Peptide(Pentapeptide-3) diacetate (CAS 725232-44-0)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com