Valproic Acid EP Impurity E CAS 626-97-1
| CAS No. | 626-97-1 |
| Molecular Formula | C5H11NO |
| Molecular Weight | 101.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Valproic Acid EP Impurity E.
CATO supplies Valproic Acid EP Impurity E (CAS 626-97-1), a pharmacopoeial impurity reference standard (molecular formula C5H11NO, MW 101.15 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amide group, a hydroxyl group, an ether linkage, Valproic Acid EP Impurity E is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 101.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C5H11NO |
| Molecular Weight | 101.15 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Valproic Standards
- Valproic Acid Impurity 92 (CAS 34241-22-0)
- Valproic Acid Impurity 48 (CAS 16136-85-9)
- Valproic Acid Impurity 16 (CAS 90830-41-4)
- Valproic Acid USP Related Compound A (CAS 99-67-2)
- Valproic Acid Impurity 97 (CAS 6098-19-7)
- Valproic Acid Impurity 98 (CAS 247182-95-2)
- Valproic Acid Impurity 99 (CAS 247182-98-5)
- Valproic Acid Related compound B (CAS 247182-97-4)
Recommended Standards
- Avanafil Impurity 75 (CAS 23356-96-9)
- Furosemide Impurity 29 (CAS 4795-29-3)
- Avanafil Impurity 71 (CAS 68832-13-3)
- Promethazine Impurity 69 (CAS 129286-73-3)
- Valsartan EP Impurity B (CAS 137863-20-8)
- Amorolfine Impurity 16 (CAS CATO-C4X-154216)
- Bisoprolol EP Impurity F (CAS 1798418-82-2)
- 4-Bromo-7-chloro-3-iodo-1H-pyrrolo[3,2-c]pyridine (CAS 1000341-91-2)
- 1-(4-Hydroxy-3,5-dimethylphenyl)propan-2-one (CAS 1017081-88-7)
- 1-Boc-indole-3-boronic Acid (CAS 181365-26-4)
- 2-(((tert-Butyldimethylsilyl)oxy)methyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (CAS 1147531-06-3)
- 3-(3-Chloroprop-2-enamido)propanoic acid (CAS 1087792-14-0)
- 1-(10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-yl)-piperidin-4-ylamine (CAS 913979-79-0)
- Semaglutide Impurity 133 (CAS CATO-C4X-2226133)
Why CATO?
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