Paroxetine EP Impurity H CAS 503834-41-1
| CAS No. | 503834-41-1 |
| Molecular Formula | C19H22FNO |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Paroxetine EP Impurity H 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.
CATO supplies Paroxetine EP Impurity H (CAS 503834-41-1), a pharmacopoeial impurity reference standard (molecular formula C19H22FNOHCl, MW 335.85 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, Paroxetine EP Impurity H is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 335.85 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).
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.
Physical & Chemical Properties
| Molecular Formula | C19H22FNO HCl |
| Molecular Weight | 335.85 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 1 |
Related Paroxetine Standards
- Paroxetine Impurity 62 (CAS 100332-12-5)
- Paroxetine Impurity 43 (CAS 100332-20-5)
- Paroxetine EP Impurity G HCl (CAS 1012886-75-7)
- Paroxetine Impurity 24 (CAS 105812-81-5)
- Paroxetine EP impurity C (CAS 105813-14-7)
- Paroxetine HCl EP Impurity C (CAS 105813-14-7(free base))
- Paroxetine EP Impurity F HCl (CAS 105813-39-6)
- Paroxetine Impurity 47 (CAS 105813-40-9)
Recommended Standards
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- (R)-3-Cyclopropyl-2-methylpropanoic acid (CAS 2179069-22-6)
- Iminodiacetonitrile (CAS 628-87-5)
- Entecavir Impurity 64 (CAS CATO-C4X-107764)
- 8-Amino-6-fluoro-5-methylquinolin-2(1H)-one (CAS 1420792-26-2)
- (2S,3S)-N-(2-Methoxybenzyl)-2-phenylpiperidin-3-amine dihydrochloride (CAS 145148-39-6)
- Fibrinopeptide A (human) (CAS 25422-31-5)
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