Ethosuximide impurity 7 CAS CATO-C4X-26257
| CAS No. | CATO-C4X-26257 |
| Molecular Formula | C7H9NO2 |
| Molecular Weight | 139.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ethosuximide impurity 7 (CAS CATO-C4X-26257), a pharmacopoeial impurity reference standard (molecular formula C7H9NO2, MW 139.15 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Ethosuximide impurity 7 (C7H9NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 139.15 g/mol, it falls into the low-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).
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 | C7H9NO2 |
| Molecular Weight | 139.15 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Ethosuximide Standards
- Ethosuximide impurity 17 (CAS CATO-C4X-262517)
- Ethosuximide impurity 13 (CAS CATO-C4X-262513)
- Ethosuximide impurity 14 (CAS CATO-C4X-262514)
- Ethosuximide impurity 18 (CAS CATO-C4X-262518)
- Ethosuximide impurity 15 (CAS 39121-82-9)
- Ethosuximide impurity 16 (CAS 2024884-97-5)
- Ethosuximide (CAS 77-67-8)
- Ethosuximide EP Impurity B (CAS 50598-33-9)
Recommended Standards
- Drotaverine Impurity 16 (CAS 37491-68-2)
- Deferiprone Impurity 6 (CAS CATO-C4X-30486)
- 2,5-Dimethoxy Pyridine (CAS 867267-24-1)
- 3-Hydroxy-1,2-dimethyl-4(1H)-pyridone (CAS 30652-11-0)
- Avibactam impurity 93 (CAS CATO-C4X-134893)
- Mesalazine EP Impurity D (CAS 99-05-8)
- Difelikefalin Impurity 61 (CAS 1024829-76-2)
- (2R,3R,4R,5R)-2-(4-amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-5-((R)-1-hydroxyethyl)-3-methyltetrahydrofuran-3,4-diol (CAS 1417563-18-8)
- 1-(Tert-butyl)-N-(pyridin-2-ylmethyl)piperidin-4-amine (CAS 1183603-76-0)
- 5-Bromo-2-tert-butyl-2,3-dihydro-1H-isoindol-1-one (CAS 864866-72-8)
- 5-Methoxy-2-propoxyaniline (CAS 104338-45-6)
- (3E,5E)-1-Methyl-3,5-bis[(naphthalen-1-yl)methylidene]piperidin-4-one (CAS 920030-46-2)
- Perospirone Impurity 52 HCl (CAS CATO-C4X-245852)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com