Pregnenolone Impurity 13 CAS 68520-34-3
| CAS No. | 68520-34-3 |
| Molecular Formula | C22H34O3 |
| Molecular Weight | 346.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Pregnenolone Impurity 13 (CAS 68520-34-3) is a certified pharmaceutical impurity reference standard with the molecular formula C22H34O3 and a molecular weight of 346.50 g/mol.
Structurally, Pregnenolone Impurity 13 (C22H34O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 346.50 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C22H34O3 |
| Molecular Weight | 346.50 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| CAS Registry Year (est.) | 1976 |
Related Pregnenolone Standards
- Pregnenolone Carbonitrile (CAS 1434-54-4)
- Pregnenolone Impurity 9 (CAS 66905-18-8)
- Pregnenolone Acetate (CAS 1778-02-5)
- Pregnenolone Impurity 14 (CAS 911452-26-1)
- Pregnenolone Impurity 12 (CAS 66880-01-1)
- Pregnenolone-d4 (CAS 61574-54-7)
- Pregnenolone 17α-Acetoxy (CAS 2381-45-5)
- 3-epi-Pregnenolone (CAS 19037-28-6)
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