Trihexyphenidyl Impurity 19 CAS 5557-93-7
| CAS No. | 5557-93-7 |
| Molecular Formula | C12H16 |
| Molecular Weight | 160.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Trihexyphenidyl Impurity 19 is closely related to an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Trihexyphenidyl Impurity 19 (CAS 5557-93-7) is a certified pharmaceutical impurity reference standard with the molecular formula C12H16 and a molecular weight of 160.26 g/mol.
Structurally, Trihexyphenidyl Impurity 19 (C12H16) contains an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 160.26 g/mol, it falls into the medium-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.
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 | C12H16 |
| Molecular Weight | 160.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Trihexyphenidyl Standards
- Trihexyphenidyl Impurity 20 (CAS 1129-29-9)
- Trihexyphenidyl Impurity 13 (CAS 4352-39-0)
- Trihexyphenidyl impurity 15 (CAS 952-51-2)
- (R)-Trihexyphenidyl (CAS 40520-25-0)
- Trihexyphenidyl Impurity 16 (CAS 2724762-69-8)
- Trihexyphenidyl Impurity 14 HCl (CAS 344890-62-6 (free base))
- Trihexyphenidyl Hydrochloride EP Impurity A (CAS 886-06-6)
- Trihexyphenidyl impurity 17 (CAS 19734-59-9)
Recommended Standards
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