5,6-Dimethylisobenzofuran-1,3-dione CAS 5999-20-2
| CAS No. | 5999-20-2 |
| Molecular Formula | C10H8O3 |
| Molecular Weight | 176.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5,6-Dimethylisobenzofuran-1,3-dione 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.
5,6-Dimethylisobenzofuran-1,3-dione (CAS 5999-20-2), molecular formula C10H8O3 and molecular weight 176.17 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 5,6-Dimethylisobenzofuran-1,3-dione is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 176.17 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C10H8O3 |
| Molecular Weight | 176.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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.) | 1958 |
Related Dimethylisobenzofuran Standards
Recommended Standards
- 5-(Prop-2-yn-1-yloxy)benzo[d][1,3]dioxole (CAS 19947-80-9)
- 5,7-Dimethylbenzofuran-2,3-dione (CAS 31297-28-6)
- 5-(Methylamino)isoindoline-1,3-dione (CAS 24264-14-0)
- 5-Acetyl-2-amino-4-hydroxybenzonitrile (CAS 71408-03-2)
- 4-Oxo-4-(4-propylphenyl)butanoyl chloride (CAS 1429309-23-8)
- N-(Benzoyloxy)-2-((5-chloroquinolin-8-yl)oxy)acetimidamide (CAS 88758-93-4)
- (E)-3-(3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acrylic acid (CAS 1967825-39-3)
- 1-((2R,4S,5R)-4-(bis(4-methoxyphenyl)(phenyl)methoxy)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione (CAS 76054-81-4)
- [5-(2-fluorophenoxymethyl)-1,2-oxazol-3-yl]methanamine (CAS 1249836-90-5)
- 4-(Oxan-2-ylmethoxy)piperidine (CAS 933716-34-8)
- Dimethyl-d6 Ether (gas) (CAS 17222-37-6)
- Methyl 5,6-dimethylnicotinate (CAS 1174028-18-2)
- 2-(4-Aminophenyl)-n-(propan-2-yl)acetamide (CAS 926263-77-6)
- D-[Phe6]-Semaglutide (CAS CATO-C4X-2226213)
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