Gallic Acid Impurity 1 CAS 1782069-25-3
| CAS No. | 1782069-25-3 |
| Molecular Formula | C19H26O15 |
| Molecular Weight | 494.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 494.40 g/mol gives Gallic Acid Impurity 1 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Gallic Acid Impurity 1 (CAS 1782069-25-3), a pharmacopoeial impurity reference standard (molecular formula C19H26O15, MW 494.40 g/mol) used for the identification and quantification of trace impurities in APIs.
Gallic Acid Impurity 1 (C19H26O15) contains a flavonoid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C19H26O15 |
| Molecular Weight | 494.40 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
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