3,4-Dimethylisatoic anhydride CAS 67943-96-8
| CAS No. | 67943-96-8 |
| Molecular Formula | C10H9NO3 |
| Molecular Weight | 191.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3,4-Dimethylisatoic anhydride 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.
CATO supplies 3,4-Dimethylisatoic anhydride (CAS 67943-96-8), a certified reference material (molecular formula C10H9NO3, MW 191.18 g/mol) for analytical method development and quality control.
The molecular framework of 3,4-Dimethylisatoic anhydride (C10H9NO3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C10H9NO3 |
| Molecular Weight | 191.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 3,4-Dihydroxy-1-methylquinolin-2(1H)-one (CAS 41878-54-0)
- 3,5-Difluoro-2-phenylpyridine (CAS 511522-79-5)
- 3,4-Dihydro-2H-1,5-benzodioxepin-7-ylisocyanate (CAS 368869-87-8)
- 3-amino-4-fluorobenzenesulfonic acid (CAS 349-64-4)
- Tert-butyl (2S,3R)-3-(4-chlorophenyl)aziridine-2-carboxylate (CAS 1416307-75-9)
- 1-methyl-6-oxo-2-phenylpiperidine-3-carboxamide (CAS 1311317-10-8)
- Bilirubin mixture (CAS CATO-C4X-15616)
- (3E,5E)-3,5-Bis({4-[(4-fluorophenyl)methoxy]phenyl}methylidene)-1-methylpiperidin-4-one (CAS 882083-27-4)
- 5-Phenyl-1,3,4-oxadiazol-2-yl benzoylcarbamodithioate (CAS 143851-99-4)
- 5-Hydroxy-N,3,5-trimethyl-4,5-dihydro-1H-pyrazole-1-carbothioamide (CAS 104728-82-7)
- 4-(Piperidin-3-yl)morpholine (CAS 917505-98-7)
- n-(2-Ethoxypyridin-3-yl)cyclopropanecarboxamide (CAS 1208728-12-4)
- Upadacitinib Impurity 185 (CAS CATO-C4X-2405185)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
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