Aspirin Impurity 13 CAS 57009-12-8
| CAS No. | 57009-12-8 |
| Molecular Formula | C10H10O4 |
| Molecular Weight | 194.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Aspirin Impurity 13 (CAS 57009-12-8), a pharmacopoeial impurity reference standard (molecular formula C10H10O4, MW 194.18 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Aspirin Impurity 13 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 194.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 certified reference material (CRM), Aspirin Impurity 13 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 | C10H10O4 |
| Molecular Weight | 194.18 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, 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 |
| CAS Registry Year (est.) | 1973 |
Related Aspirin Standards
Recommended Standards
- Terbutaline Impurity 62 (CAS CATO-C4X-118362)
- Salbutamol Impurity 100 (CAS 16475-90-4)
- Ketoprofen EP Impurity C (CAS 68432-95-1)
- Tadalafil Impurity 73 (CAS 326-61-4)
- Ritonavir EP Impurity Q (CAS 1414933-82-6)
- Docusate Sodium Impurity 1 (CAS 96954-01-7)
- Clotrimazole Impurity 22 (CAS 59154-29-9)
- 34123-66-5 Benzaldehyde,4-methoxy-3-(1-methylethoxy)- CTK4H1766 (CAS 34123-66-5)
- Dotinurad Impurity 68 (CAS 1285573-98-9)
- 3-(2-Ethoxyphenyl)-N-(3-(isoxazol-4-yl)propyl)propanamide (CAS 2034442-79-8)
- 8-Bromo-2-fluoro-1,5-naphthyridine (CAS 1432322-85-4)
- N-Methyl-5,6,7,8-tetrahydropyrido[4,3-c]pyridazin-3-amine dihydrobromide (CAS 1474036-15-1)
- 4,5,6,7-Tetrahydro-1-benzofuran-4-amine (CAS 389795-57-7)
- Semaglutide impurity 26 (CAS CATO-C4X-222626)
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