Mesalazine EP Impurity M CAS 2516-96-3
| CAS No. | 2516-96-3 |
| Molecular Formula | C7H4ClNO4 |
| Molecular Weight | 201.56 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.
Mesalazine EP Impurity M (CAS 2516-96-3) is a certified pharmaceutical impurity reference standard with the molecular formula C7H4ClNO4 and a molecular weight of 201.56 g/mol.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Mesalazine EP Impurity M is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 201.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Mesalazine Standards
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Recommended Standards
- 4-Nitrophenyl chloroformate (CAS 7693-46-1)
- 2-Chloro-4-nitrobenzoic Acid (CAS 99-60-5)
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- 4-Chloro-3-nitrobenzoic Acid (CAS 96-99-1)
- Atosiban Impurity 97 (CAS CATO-C4X-229397)
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- Eribulin Impurity 12 (CAS CATO-C4X-265012)
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- (4-Chlorophenyl)(tetrahydrofuran-3-yl)methanamine (CAS 1250330-72-3)
- 2-Ethylhexyl sulfate sodium salt (CAS 126-92-1)
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- (R)-5-Fluoro-2-(pyrrolidin-2-yl)pyridine hydrochloride (CAS 2089388-64-5)
- SAMS Peptide (CAS 125911-68-4)
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