Ulipristal Impurity 19 CAS CATO-C4X-191519
| CAS No. | CATO-C4X-191519 |
| Molecular Formula | C26H32O6 |
| Molecular Weight | 440.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C26H32O6, Ulipristal Impurity 19 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 440.53 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Ulipristal Impurity 19 (CAS CATO-C4X-191519), a pharmacopoeial impurity reference standard (molecular formula C26H32O6, MW 440.53 g/mol) used for the identification and quantification of trace impurities in APIs.
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), Ulipristal Impurity 19 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 | C26H32O6 |
| Molecular Weight | 440.53 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Ulipristal Standards
- Ulipristal Impurity 25 (CAS CATO-C4X-191525)
- Ulipristal D3 (CAS CATO-C4X-191535)
- Ulipristal Impurity 16 (CAS 159811-51-5)
- Ulipristal Impurity 1 (CAS 159681-67-1)
- Ulipristal Impurity 3 (CAS 159681-66-0)
- Ulipristal Impurity 13 (CAS CATO-C4X-191513)
- Ulipristal Impurity 21 (CAS CATO-C4X-191521)
- Ulipristal Impurity 4 (CAS 244206-52-8)
Recommended Standards
- Tetrakis(p-tolyloxy)methane (CAS 54974-05-9)
- Pemafibrate Impurity 78 (CAS CATO-C4X-290378)
- M-ACetylphenyl-peg5-t-butyl ester (CAS 2110448-95-6)
- Triamcinolone Acetonide-d6 (CAS 352431-33-5)
- Brexpiprazole Impurity 44 (CAS CATO-C4X-113144)
- Cetirizine Impurity 17 (CAS CATO-C4X-158217)
- Vitamin Impurity 28 (CAS 5006-20-2)
- 4,4,4-Trifluoro-2-(4-fluorophenyl)-3-oxobutanenitrile (CAS 3108-23-4)
- 5-(2-Chlorophenyl)furan-2-carbaldehyde (CAS 34035-04-6)
- 4-Cyano-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-methanol (CAS 1805585-26-5)
- tert-Butyl 3-oxo-5,7-dihydro-2H-pyrrolo[3,4-c]pyridazine-6(3H)-carboxylate (CAS 1395493-25-0)
- Acetyl-δ-Endorphin (bovine, camel, mouse, ovine) (CAS 78325-29-8)
- 1-(4-(Difluoromethyl)phenyl)naphthalene (CAS 1261624-49-0)
- Semaglutide Impurity 162 (x TFA Salt) (CAS CATO-C4X-2226162)
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