Valproate impurity 90 CAS CATO-C4X-116690
| CAS No. | CATO-C4X-116690 |
| Molecular Formula | C11H16O4 |
| Molecular Weight | 212.24 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.
CATO supplies Valproate impurity 90 (CAS CATO-C4X-116690), a pharmacopoeial impurity reference standard (molecular formula C11H16O4, MW 212.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C11H16O4, Valproate impurity 90 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 212.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C11H16O4 |
| Molecular Weight | 212.24 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Valproate Standards
- Valproate Impurity 82 (CAS CATO-C4X-116682)
- Valproate Impurity 38 (CAS 55898-43-6)
- Sodium Valproate Impurity 42 (CAS 258264-00-5)
- Valproate Impurity 84 (CAS CATO-C4X-116684)
- Valproate Impurity 96 (CAS CATO-C4X-116696)
- Sodium Valproate Impurity 15 (CAS 2163-48-6)
- Sodium Valproate Impurity 28 (CAS 759-36-4)
- Valproate Impurity 73 (CAS CATO-C4X-116673)
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- 5-Isopropyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 163078-85-1)
- 5-Fluoro-4-isopropoxypyridin-3-ol (CAS 1362857-67-7)
- 6-Bromo-8-methyltetrazolo[1,5-a]pyridine (CAS 2763964-74-3)
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Why CATO?
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