Pyridostigmine Impurity 2 CAS 4685-07-8(free base)
| CAS No. | 4685-07-8(free base) |
| Molecular Formula | I |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Pyridostigmine Impurity 2 (IC6H8NO) contains an amide group, a hydroxyl group, an ether linkage, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 237.04 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Pyridostigmine Impurity 2 (CAS 4685-07-8(free base)) is a certified pharmaceutical impurity reference standard with the molecular formula IC6H8NO and a molecular weight of 237.04 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Pyridostigmine Impurity 2 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 | I C6H8NO |
| Molecular Weight | 237.04 g/mol |
| Appearance | 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 tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | I-containing |
| Nitrogen Atoms | 1 |
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 Bromide EP Impurity A (CAS 51581-32-9)
- Pyridostigmine Bromide Hydroxy Impurity (CAS 587-32-6)
- Pyridostigmine Impurity 3 (CAS 7500-05-2)
Recommended Standards
- [y-Glu15]-Semaglutide Impurity 134 (CAS CATO-C4X-2226134)
- Cefaclor EP Impurity B (CAS 53994-69-7)
- Gadobutrol Impurity 186 (CAS CATO-C4X-2120186)
- (+/-)-4'-Bromohymenin 184887-85-2 4-(2-Amino-5-bromo-1H-imidazol-4-yl)-2,3-dibromo-4,5,6,7-tetrahydro-pyrrolo[2,3-c]azepin-8(1H)-one (CAS 184887-85-2)
- 20451-53-0 Phenyl vinyl sulphoxide EINECS 243-831-6 (CAS 20451-53-0)
- 5-{[(3-methoxyphenyl)methyl]amino}-1-methyl-3-(trifluoromethyl)-1H-pyrazole-4-carbonitrile (CAS 318517-84-9)
- 4-[(4-Methoxyphenyl)sulfanyl]-2-(pyridin-2-yl)-6-(trifluoromethyl)pyrimidine (CAS 338418-07-8)
- 2-(4-Piperidylmethyl)pyrimidine (CAS 811812-60-9)
- 4-(4,4-Dimethyl-1,3-oxazolidine-3-carbonyl)benzonitrile (CAS 866157-35-9)
- Allo-D-Ile12-Tirzepatide (CAS CATO-CPTD788963)
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