Pyridostigmine Impurity 4 CAS CATO-C4X-26304
| CAS No. | CATO-C4X-26304 |
| Molecular Formula | C17H22N4O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution, Pyridostigmine Impurity 4 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 426.29 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a process- or degradation-related impurity, Pyridostigmine Impurity 4 (CAS CATO-C4X-26304, C17H22N4O4Br) 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), Pyridostigmine Impurity 4 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 | C17H22N4O4 2*Br |
| Molecular Weight | 426.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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) | 8.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |
Related Pyridostigmine Standards
- Pyridostigmine Bromide (CAS 101-26-8)
- Pyridostigmine (CAS 155-97-5)
- Pyridostigmine-d3 Bromide (CAS 1633751-00-4)
- Pyridostigmine-d6 Bromide (CAS 2375858-08-3)
- Pyridostigmine EP Impurity B Bromide (CAS 31034-86-3)
- Pyridostigmine Impurity 2 (CAS 4685-07-8(free base))
- Pyridostigmine Bromide EP Impurity A (CAS 51581-32-9)
- Pyridostigmine Bromide Hydroxy Impurity (CAS 587-32-6)
Recommended Standards
- Indacaterol Impurity 2 (CAS 100331-89-3)
- Prilocaine Impurity N2 (CAS 3098-67-7)
- Ramipril Impurity 6 (CAS 85196-26-5)
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- 1-(4-(tert-Butyl)phenyl)-5-nitro-1H-indazol-3-amine (CAS 1133430-70-2)
- (S)-(Tetrahydrofuran-2-yl)methanol (CAS 57203-01-7)
- Methyl 3-fluoro-5-methylpyrazolo[1,5-a]pyrimidine-7-carboxylate (CAS 916211-88-6)
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- 2,4-dichloro-6-(2,2,2-trifluoroethoxy)-1,3,5-triazine (CAS 185677-00-3)
- a-Bag Cell Peptide (1-8) (CAS 87549-53-9)
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