Neostigmine Impurity 2 CAS CATO-C4X-20422
| CAS No. | CATO-C4X-20422 |
| Molecular Formula | C23H33N4O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Neostigmine Impurity 2 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Neostigmine Impurity 2 (CAS CATO-C4X-20422) is a certified pharmaceutical impurity reference standard with the molecular formula C23H33N4O4CH3O4S and a molecular weight of 540.63 g/mol.
Structurally, Neostigmine Impurity 2 (C23H33N4O4CH3O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 540.63 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), Neostigmine 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 | C23H33N4O4 CH3O4S |
| Molecular Weight | 540.63 g/mol |
| 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 |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Neostigmine Standards
- Neostigmine Bromide (CAS 114-80-7)
- Neostigmine bromide Impurity 14 (CAS 14318-66-2)
- Neostigmine Impurity 24 (CAS 15799-79-8)
- Neostigmine EP Impurity C (CAS 16088-19-0)
- Neostigmine Methyl Sulfate - Impurity A (Bromide Salt) (CAS 1620-19-5)
- Neostigmine Impurity 50 (CAS 16460-28-9)
- Neostigmine Impurity 4 (CAS 19962-04-0)
- Neostigmine impurity 31 (CAS 22237-93-0（free base）)
Recommended Standards
- Empagliflozin Impurity 278 (CAS CATO-C4X-1065278)
- Metaraminol Impurity 92 (CAS CATO-C4X-225292)
- Brimonidine Impurity 7 (CAS CATO-C4X-15667)
- 1-(3-(4-Nitrophenyl)propanoyl)azetidin-2-one (CAS 1024602-82-1)
- 2,4-dimethyl-5-sulfamoylbenzoic acid (CAS 926207-60-5)
- Enrofloxacin D5 hydrochloride (CAS 2733718-29-9)
- Methanesulfonic acid 5-Boc-amino-pentyl ester (CAS 775579-10-7)
- CAS 178744-28-0 (CAS 178744-28-0)
- (5R)-5-[3-(1,1,2,2,3,3,3-heptadeuteriopropoxy)-4-methoxyphenyl]-5-methyl-1,3-oxazolidin-2-one (CAS 1795787-13-1)
- Liraglutide Impurity 14 TFA Salt (CAS CATO-C4X-199214)
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