Estradiol Valerate Impurity 19 CAS CATO-C4X-284219
| CAS No. | CATO-C4X-284219 |
| Molecular Formula | C18H22O2 |
| Molecular Weight | 270.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Estradiol Valerate Impurity 19 (CAS CATO-C4X-284219), a pharmacopoeial impurity reference standard (molecular formula C18H22O2, MW 270.37 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, a hydroxyl group, an ether linkage, Estradiol Valerate Impurity 19 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 270.37 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Estradiol Valerate 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 | C18H22O2 |
| Molecular Weight | 270.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ＞95% |
| 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 |
Related Estradiol Standards
- Estradiol Hemihydrate EP Impurity A (CAS 19973-76-3)
- Estradiol Impurity 2 (17beta-delta8,9-Dehydroestradiol) (CAS 23392-52-1)
- Estradiol EP Impurity D (CAS 791-69-5)
- Estradiol Impurity 21 (CAS 1187829-63-5)
- Estradiol Impurity 34 (CAS 3563-27-7)
- Estradiol Impurity 7 (CAS 7291-41-0)
- Estradiol Valerate Impurity 14 (CAS 57605-52-4)
- Estradiol Valerate Impurity 15 (CAS 55448-91-4)
Recommended Standards
- Estradiol Valerate Impurity 18 (CAS CATO-C4X-284218)
- Estetrol Impurity 7 (CAS 58699-14-2)
- Estradiol Valerate Impurity 17 (CAS 57605-51-3)
- Hexestrol (CAS 84-16-2)
- Salicylic Acid Impurity 22 (CAS CATO-C4X-190222)
- Fosfomycin Impurity 25 (CAS CATO-C4X-131625)
- Pheniramine EP Impurity B (CAS 2116-65-6)
- 6-Fluoropyridine-3-sulfonyl fluoride (CAS 1259065-58-1)
- 5-Iodo-6-methylindoline (CAS 1935509-31-1)
- Ethyl 4-hydroxy-1-isopentyl-7-methyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate (CAS 1253791-40-0)
- (R)-2-(4-methoxyphenyl)-2-(methylamino)ethan-1-ol (CAS 1336079-07-2)
- (4-(Benzylthio)phenyl)boronic acid (CAS 1005207-32-8)
- 6-Chloro-2-(3,4-dimethylphenyl)imidazo[1,2-a]pyridine-3-carbaldehyde (CAS 881041-15-2)
- Acetyl Tripeptide-1 (CAS 350595-76-5)
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