Pyridostigmine Impurity 3 CAS 7500-05-2
| CAS No. | 7500-05-2 |
| Molecular Formula | I |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Pyridostigmine Impurity 3 (IC6H8NO) contains an amide group, a hydroxyl group, an ether linkage, iodine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Pyridostigmine Impurity 3 (CAS 7500-05-2) is a certified pharmaceutical impurity reference standard with the molecular formula IC6H8NO and a molecular weight of 237.04 g/mol.
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.
CATO manufactures Pyridostigmine Impurity 3 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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 |
| CAS Registry Year (est.) | 1959 |
| 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 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
- Vericiguat Impurity 73 (CAS CATO-C4X-289673)
- Istradefylline Impurity 13 (CAS 14436-34-1)
- Tofacitinib Impurity 121 (CAS 1228879-37-5)
- 359-40-0 Ethanedioyl difluoride Oxalyl difluoride Oxalyl fluoride 4-02-00-01853 (Beilstein Handbook Reference) BRN 1743349 Difluorid kyseliny stavelove [Czech] EINECS 206-630-4 TL 108 Difluorid kyseliny stavelove (CAS 359-40-0)
- 4-Cyclopropoxy-5-ethyl-2-isopropylpyridine (CAS 1243474-69-2)
- Anthracen-2-ylmethanol (CAS 22863-82-7)
- (S)-2-formamidohexanoic acid (CAS 133388-96-2)
- tert-Butyl N-[1-(2-hydroxyphenyl)ethyl]carbamate (CAS 2126177-01-1)
- ammonium bicarbonate (CAS 1066-33-7)
- Acetyl-(Leu28·31)-Neuropeptide Y (24-36) (CAS 155709-24-3)
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