Estradiol Valerate Impurity 11 CAS CATO-C4X-284211
| CAS No. | CATO-C4X-284211 |
| Molecular Formula | C23H38O5 |
| Molecular Weight | 394.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C23H38O5, Estradiol Valerate Impurity 11 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 394.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
Estradiol Valerate Impurity 11 (CAS CATO-C4X-284211) is a certified pharmaceutical impurity reference standard with the molecular formula C23H38O5 and a molecular weight of 394.54 g/mol.
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C23H38O5 |
| Molecular Weight | 394.54 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Estradiol Standards
- Estradiol Impurity 47 (CAS CATO-C4X-163647)
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- Estradiol Impurity 18 (CAS 63042-22-8)
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Recommended Standards
- Teprenone impurity 47 (CAS CATO-C4X-208147)
- Protylonolide (CAS 74758-60-4)
- Nor Cholic Acid (CAS 60696-62-0)
- 1,5-Bis(phenylthio)anthracene (CAS 116205-50-6)
- Avibactam Impurity 160 (CAS CATO-C4X-1348160)
- Orbifloxacin impurity 13 (CAS CATO-C4X-256713)
- Fasudil impurity 65 (CAS CATO-C4X-136565)
- 3-Hydroxyphenylacetylene (CAS 10401-11-3)
- Methyl 6-Methylpiperidine-3-carboxylate Hydrochloride (CAS 1009376-74-2)
- Ethyl (2-ethoxy-4-formylphenoxy)acetate (CAS 51264-71-2)
- N-(3,4-dimethylphenyl)-2-((4-(3-phenylthioureido)phenyl)thio)acetamide (CAS 763128-88-7)
- Methyl 4-oxo-6-(thiophen-2-yl)-4,5-dihydro-[1,2,3]triazolo[1,5-a]pyrazine-3-carboxylate (CAS 1403233-70-4)
- 5-Acetyl-4-(4-ethylphenyl)-2-((2-(4-ethylphenyl)-2-oxoethyl)thio)-6-methyl-1,4-dihydropyridine-3-carbonitrile (CAS 5691-14-5)
- Insulin Degludec Impurity 17 (CAS CATO-C4X-215717)
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