Aspirin Impurity C / Mesalazine EP Impurity H CAS 69-72-7
| CAS No. | 69-72-7 |
| Molecular Formula | C7H6O3 |
| Molecular Weight | 138.12 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Aspirin Impurity C / Mesalazine EP Impurity H is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 138.12 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Aspirin Impurity C / Mesalazine EP Impurity H (CAS 69-72-7, C7H6O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 C / Mesalazine EP Impurity H 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 | C7H6O3 |
| Molecular Weight | 138.12 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Aspirin Standards
Recommended Standards
- Acipimox Impurity 1 (CAS 5521-55-1)
- Glipizide Impurity 13 (CAS 5521-61-9)
- Acipimox Impurity 7 (CAS 6164-79-0)
- Nalfurafine Impurity 9 (CAS 539-47-9)
- Terbutaline Impurity 57 (CAS CATO-C4X-118357)
- Ixazomib Impurity 49 (CAS CATO-C4X-126749)
- Vericiguat Impurity 65 (CAS CATO-C4X-289665)
- 3-(Chloromethyl)-3-ethyltetrahydrofuran (CAS 15945-79-6)
- 2-((4-Methylcyclohexyl)amino)cyclohexan-1-ol (CAS 1179954-91-6)
- 2,2-Difluoro-2-(thiophen-2-yl)ethan-1-ol (CAS 1443500-45-5)
- 4-Chloro-1-[4-(phenylsulfonyl)-1-piperazinyl]-1-butanone (CAS 731011-96-4)
- Methyl 5-((2-chloro-4-fluorophenoxy)methyl)furan-2-carboxylate (CAS 438220-96-3)
- 3-Hydroxy-2,3-dimethylbutan-2-yl hydrogen (4-chloro-2-cyclopropylphenyl)boronate (CAS 2223040-59-1)
- Cholecystokinin Octapeptide (1-3) (desulfated) H-Asp-Tyr-Met-OH (CAS 121880-94-2)
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