Aspirin Impurity 20 CAS 7695-70-7
| CAS No. | 7695-70-7 |
| Molecular Formula | C13H14O9 |
| Molecular Weight | 314.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Aspirin Impurity 20 (CAS 7695-70-7, C13H14O9) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Aspirin Impurity 20 (C13H14O9) is characterized by 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures Aspirin Impurity 20 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 | C13H14O9 |
| Molecular Weight | 314.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
Related Aspirin Standards
Recommended Standards
- 2-(3-Bromo-4-methoxyphenyl)-2-[(trimethylsilyl)oxy]acetonitrile (CAS 1273671-42-3)
- 4-[(2,3,5,6-Tetrafluorophenoxy)methyl]benzohydrazide (CAS 834913-90-5)
- Methyl 4-(6-hydroxy-5-nitrobenzo[d]oxazol-2-yl)benzoate (CAS 133554-24-2)
- 4-(4-Fluoro-2-(trifluoromethyl)benzoyl)-N-methyl-1H-pyrrole-2-carboxamide (CAS 477852-59-8)
- Etizolam Impurity 17 (CAS CATO-C4X-350917)
- Bortezomib Impurity 27 (CAS CATO-C4X-107227)
- Flomoxef Impurity 24 (CAS CATO-C4X-138224)
- 2'/3'-O-Trinitrophenyl-adenosine-5'-diphosphate (CAS 77450-67-0)
- 2-(Aminomethyl)-n-(propan-2-yl)benzene-1-sulfonamide (CAS 918865-06-2)
- Calpeptin (CAS 117591-20-5)
- n-(3,5-Difluorophenyl)piperidine-2-carboxamide hydrochloride (CAS 1078163-26-4)
- Ritanserin (CAS 87051-43-2)
- 2-Cycloheptyl-2-hydroxyacetic acid (CAS 18537-84-3)
- Semaglutide impurity 69 (CAS CATO-C4X-222669)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com