Alfacalcidol Impurity 7 CAS CATO-C4X-13937
| CAS No. | CATO-C4X-13937 |
| Molecular Formula | C27H44O2 |
| Molecular Weight | 400.64 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Alfacalcidol Impurity 7 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.
Alfacalcidol Impurity 7 (CAS CATO-C4X-13937) is a certified pharmaceutical impurity reference standard with the molecular formula C27H44O2 and a molecular weight of 400.64 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, Alfacalcidol Impurity 7 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 400.64 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 | C27H44O2 |
| Molecular Weight | 400.64 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Alfacalcidol Standards
- Alfacalcidol (CAS 41294-56-8)
- Alfacalcidol EP Impurity A (CAS 65445-14-9)
- Alfacalcidol impurity 13 (CAS 58028-00-5)
- Alfacalcidol impurity 14 (CAS CATO-C4X-139314)
- Alfacalcidol impurity 15 (CAS 1279049-53-4)
- Alfacalcidol EP Impurity B (CAS 63181-13-5)
- Alfacalcidol Impurity 20 (CAS CATO-C4X-139320)
- Alfacalcidol Impurity 21 (CAS CATO-C4X-139321)
Recommended Standards
- Alfacalcidol Impurity 31 (CAS CATO-C4X-139331)
- Alfacalcidol impurity 9 (CAS CATO-C4X-13939)
- Alfacalcidol Impurity 28 (CAS CATO-C4X-139328)
- Calcitriol Impurity 10 (CAS 65445-15-0)
- Lumateperone Impurity 69 (CAS CATO-C4X-220169)
- Progesterone Impurity 69 (CAS CATO-C4X-150269)
- Mivacurium Chloride Impurity 7 (S-S isomer) (CAS 104758-51-2)
- 2-{[1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]oxy}-1-(morpholin-4-yl)ethan-1-one (CAS 477711-97-0)
- 3-Acetylquinoline-4-carboxylic acid (CAS 1876-15-9)
- 1-Methoxy-2,3-dinitrobenzene (CAS 16315-07-4)
- (2Z)-2-[(Z)-Benzoyl]-3-{3-[(2-chloro-6-fluorophenyl)methyl]-2,4-dimethoxyphenyl}prop-2-enenitrile (CAS 477869-87-7)
- 3-(Sec-butoxy)propane-1-sulfonyl chloride (CAS 1407260-18-7)
- (2S,3R)-N-(tert-Butyloxycarbonyl)-3-methyl-5-oxo-pyrrolidinecarboxylic Acid (CAS 910548-25-3)
- Semaglutide impurity 205 (CAS CATO-C4X-2226205)
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