Pralidoxime Chloride Impurity 1 CAS 3697-38-9
| CAS No. | 3697-38-9 |
| Molecular Formula | C7H8NO2 |
| Molecular Weight | N/A |
| 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.
As a process- or degradation-related impurity, Pralidoxime Chloride Impurity 1 (CAS 3697-38-9, C7H8NO2Cl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C7H8NO2Cl, Pralidoxime Chloride Impurity 1 contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 173.60 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), Pralidoxime Chloride Impurity 1 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 | C7H8NO2 Cl |
| Molecular Weight | 173.60 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Pralidoxime Standards
- Pralidoxime Methyl Sulphate (CAS 1200-55-1)
- (Z)-Pralidoxime Chloride (CAS 13698-37-8)
- (E)-Pralidoxime Chloride (CAS 14018-50-9)
- Pralidoxime Chloride Impurity 11 (CAS 21032-31-5)
- Pralidoxime Chloride Impurity 5 (CAS 3313-51-7)
- Pralidoxime Chloride Impurity 4 (CAS 3784-97-2)
- Pralidoxime Chloride Impurity 6 (CAS 3785-03-3)
- Pralidoxime Chloride Impurity 10 (CAS 45750-74-1)
Recommended Standards
- Fesoterodine Impurity 1 (CAS 250214-44-9)
- Flunarizine EP Impurity B (CAS 39245-25-5)
- Atorvastatin Impurity 71 (CAS CATO-C4X-113271)
- 2-[(3-Chlorophenyl)amino]-N-(4-pyridylmethyl)-4-(trifluoromethyl)pyrimidine-5-carboxamide Hydrochloride (CAS 1092502-33-4)
- 6-(6-(Trifluoromethyl)pyridin-2-yl)-1,3,5-triazine-2,4(1H,3H)-dione (CAS 1446507-38-5)
- 2-Methoxy-5-(morpholine-4-sulfonyl)benzoic acid (CAS 168890-59-3)
- Cefamandole Impurity 25 (CAS CATO-C4X-122125)
- 5-(Phenylethynyl)nicotinonitrile (CAS 845266-26-4)
- 3407-42-9 Cyclohexanol, 3-(5,5,6-trimethylbicyclo(2.2.1)hept-2-yl)- 3-(5,5,6-Trimethylbicyclo(2.2.1)hept-2-yl)cyclohexan-1-ol Cyclohexanol, (5,5,6-trimethyl-2-norbornyl)- EINECS 222-294-1 Isocamphyl cyclohexanol, mixed isomers 3-(5,5,6-Trimethyl-2-norbornyl)cyclohexanol EC 222-294-1 (CAS 3407-42-9)
- Semaglutide impurity 249 (CAS CATO-C4X-2226249)
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