Paraben Impurity 3 CAS CATO-C4X-25693
| CAS No. | CATO-C4X-25693 |
| Molecular Formula | C13H18O8 |
| Molecular Weight | 302.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Paraben Impurity 3 is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Paraben Impurity 3 (CAS CATO-C4X-25693) is a certified pharmaceutical impurity reference standard with the molecular formula C13H18O8 and a molecular weight of 302.28 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Paraben Impurity 3 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 302.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Paraben Impurity 3 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 | C13H18O8 |
| Molecular Weight | 302.28 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 10 (CAS CATO-C4X-256910)
- Paraben Impurity 4 (CAS CATO-C4X-25694)
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- Methyl Paraben Glucuronide (CAS 96294-25-6)
- Paraben Impurity 5 (CAS CATO-C4X-25695)
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- Paraben Impurity 8 (CAS CATO-C4X-25698)
- Butyl Paraben-13C6 (CAS 1416711-53-9)
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