Mesalazine EP Impurity Q CAS 3970-35-2
| CAS No. | 3970-35-2 |
| Molecular Formula | C7H4ClNO4 |
| Molecular Weight | 201.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Mesalazine EP Impurity Q (CAS 3970-35-2, C7H4ClNO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C7H4ClNO4, Mesalazine EP Impurity Q contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 201.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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), Mesalazine EP Impurity Q 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 | C7H4ClNO4 |
| Molecular Weight | 201.56 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Mesalazine Standards
- Mesalazine EP Impurity M (CAS 2516-96-3)
- Mesalazine Impurity 46 (CAS 34662-36-7)
- Mesalazine Impurity 26 (CAS 1689-82-3)
- Mesalazine Impurity 27 (CAS 2362-57-4)
- Mesalazine Impurity 29 (CAS 2437-11-8)
- Mesalazine Impurity 24 (CAS 859964-08-2)
- Mesalazine Impurity 21 (CAS 51-59-2)
- Mesalazine N-Propionyl Impurity (CAS 93968-80-0)
Recommended Standards
- 4-Nitrophenyl chloroformate (CAS 7693-46-1)
- 4-Chloro-3-nitrobenzoic Acid (CAS 96-99-1)
- 2-Chloro-4-nitrobenzoic Acid (CAS 99-60-5)
- 2-Chloro-3-nitropyridine-4-carboxamide (CAS 1224636-91-2)
- Cefalonium Impurity 1 (CAS CATO-C4X-22541)
- Aripiprazole Impurity 81 (CAS 1352492-04-6)
- Linagliptin Impurity 90 (CAS 915226-43-6)
- N-(2-phenylpropyl)tetrahydrofuran-3-amine (CAS 1339583-43-5)
- N-(1-(4-fluorophenyl)ethyl)-N-methylglycine (CAS 1353976-40-5)
- 3-(propan-2-yl)cyclobutan-1-one (CAS 32314-56-0)
- Ganosporeric acid A (CAS 135357-25-4)
- 4-(Difluoromethyl)-6-fluoro-2-iodonicotinaldehyde (CAS 1805292-87-8)
- 4-Benzyl 1-(tert-butyl) (R)-2-(hydroxymethyl)piperazine-1,4-dicarboxylate (CAS 930782-89-1)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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