Paraben Impurity 5 CAS CATO-C4X-25695
| CAS No. | CATO-C4X-25695 |
| Molecular Formula | C12H16O7 |
| Molecular Weight | 272.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Paraben Impurity 5 (CAS CATO-C4X-25695) is a certified pharmaceutical impurity reference standard with the molecular formula C12H16O7 and a molecular weight of 272.25 g/mol.
Structurally, Paraben Impurity 5 (C12H16O7) 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 272.25 g/mol, it falls into the medium-molecular-weight range. 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).
As a certified reference material (CRM), Paraben Impurity 5 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.
Physical & Chemical Properties
| Molecular Formula | C12H16O7 |
| Molecular Weight | 272.25 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, acetonitrile, DMSO, water (slightly soluble) |
| 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 |
Related Paraben Standards
- Paraben Impurity 6 (CAS CATO-C4X-25696)
- Paraben Impurity 8 (CAS CATO-C4X-25698)
- Paraben Impurity 10 (CAS CATO-C4X-256910)
- Paraben Impurity 3 (CAS CATO-C4X-25693)
- Paraben Impurity 4 (CAS CATO-C4X-25694)
- Paraben Impurity 9 (CAS CATO-C4X-25699)
- Methyl Paraben Glucuronide (CAS 96294-25-6)
- Butyl Paraben-13C6 (CAS 1416711-53-9)
Recommended Standards
- Propofol impurity 62 (CAS 110007-31-3)
- Aspirin Impurity 14 (CAS 85531-25-5)
- (S)-Naringenin (CAS 480-41-1)
- Letermovir Impurity 14 (CAS CATO-C4X-291514)
- Fluconazole Impurity 34 (CAS CATO-C4X-101934)
- Terazosin EP Impurity M (CAS 31350-28-4)
- Lobeline impurity 8 (CAS CATO-C4X-18188)
- Aristolochic acid I (CAS 10190-99-5)
- Telmisartan EP Impurity C (CAS 144702-26-1)
- Ethyl 2-(4-Methoxybenzyl)oxazole-4-carboxylate (CAS 1134024-15-9)
- α-4,5-dibenzoyl-2-cyano- D-deoxyribrate (CAS 226232-74-2)
- 2-Methyl-6-(piperidin-3-yl)pyrimidin-4-ol (CAS 1177316-76-5)
- 2-Methyl-1H-pyrrolo[2,3-b]pyridine-6-carbonitrile (CAS 1352394-35-4)
- Semaglutide impurity 29 (CAS 110990-08-4)
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