4-Methyl-3a,4,5,7a-tetrahydroisobenzofuran-1,3-dione CAS 23939-62-0
| CAS No. | 23939-62-0 |
| Molecular Formula | C9H10O3 |
| Molecular Weight | 166.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Methyl-3a,4,5,7a-tetrahydroisobenzofuran-1,3-dione (CAS 23939-62-0), a certified reference material (molecular formula C9H10O3, MW 166.17 g/mol) for analytical method development and quality control.
The molecular framework of 4-Methyl-3a,4,5,7a-tetrahydroisobenzofuran-1,3-dione (C9H10O3) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C9H10O3 |
| Molecular Weight | 166.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
Recommended Standards
- 4-Methyl-2-methoxybenzoic acid (CAS 704-45-0)
- 4-Methyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione (CAS 5333-84-6)
- 4-Methoxy-6-methylsalicylaldehyde (CAS 34883-08-4)
- 5-(Hydroxymethyl)-2-methylbenzoic acid (CAS 2211-78-1)
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