Erlotinib Impurity 79 CAS 382150-30-3
| CAS No. | 382150-30-3 |
| Molecular Formula | C11H14O4 |
| Molecular Weight | 210.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Erlotinib Impurity 79 (C11H14O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, 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 210.23 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.
As a process- or degradation-related impurity, Erlotinib Impurity 79 (CAS 382150-30-3, C11H14O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C11H14O4 |
| Molecular Weight | 210.23 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Erlotinib Standards
- Erlotinib Impurity 78 (CAS 174674-93-2)
- Erlotinib Impurity 61 (CAS 20825-87-0)
- Erlotinib Impurity 105 (CAS 33432-52-9)
- Erlotinib impurity 130 (CAS 585-79-5)
- Erlotinib Impurity 87 (CAS CATO-C4X-106987)
- Erlotinib Impurity 123 (CAS 1145671-36-8)
- Erlotinib Impurity 112 (CAS 555-68-0)
- Erlotinib Impurity 51 (CAS 115665-66-2)
Recommended Standards
- Dabigatran Impurity 147 (CAS 1370605-46-1)
- N-Boc-1-Guanylpyrazole (CAS 152120-61-1)
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- 3,4-Dimetho3-(3,4-Dimethoxyphenyl)propionic acid (CAS 2107-70-2)
- Ezetimibe Impurity 118 (CAS CATO-C4X-1098118)
- Oxacillin Impurity 11 (CAS CATO-C4X-232111)
- Ramosetron Impurity 12 (CAS 171967-74-1)
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- 1-(3,5-Dimethylphenyl)cyclobutane-1-carbonitrile (CAS 1154178-68-3)
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