1,3-Dioxo-1,3-dihydroisobenzofuran-4-carboxylic acid CAS 3786-39-8
| CAS No. | 3786-39-8 |
| Molecular Formula | C9H4O5 |
| Molecular Weight | 192.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1,3-Dioxo-1,3-dihydroisobenzofuran-4-carboxylic acid (C9H4O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO supplies 1,3-Dioxo-1,3-dihydroisobenzofuran-4-carboxylic acid (CAS 3786-39-8), a certified reference material (molecular formula C9H4O5, MW 192.13 g/mol) for analytical method development and quality control.
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.
As a certified reference material (CRM), 1,3-Dioxo-1,3-dihydroisobenzofuran-4-carboxylic acid 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.
Physical & Chemical Properties
| Molecular Formula | C9H4O5 |
| Molecular Weight | 192.13 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Dioxo Standards
- 2,4-Dioxo-4-phenylbutanoic acid (CAS 5817-92-5)
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- [(1,1-dioxo-1λ6-thiolan-3-yl)methyl]urea (CAS 55260-96-3)
- 2-(1,1-dioxo-1λ⁶-thiolan-3-yl)acetohydrazide (CAS 515169-85-4)
- 1,1-dioxo-1$l^{6}-benzothiophene-5-carbonitrile (CAS 1394040-24-4)
- 1,3-Dioxo-1H,2H,3H,5H,6H,7H,8H-pyrido[1,2-c]pyrimidine-4-carbonitrile (CAS 790271-43-1)
- 2,6-Dioxo-1,2,3,6-tetrahydropyrimidine-4-sulfonamide (CAS 5338-86-3)
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Recommended Standards
- 1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic Acid (CAS 26597-44-4)
- 1H,1'H-[3,3'-Bipyrrole]-2,2',5,5'-tetraone (CAS 877220-92-3)
- 1,1,2,2-Tetrafluoroethylthioacetic acid (CAS 665-35-0)
- 2-Cyano-5-nitrobenzoic acid (CAS 774227-60-0)
- 3-[4-(trifluoromethoxy)benzenesulfonamido]propanoic acid (CAS 781626-95-7)
- RS 09 (CAS 1449566-36-2)
- (2-Bromophenyl)(2-((3-fluorobenzyl)thio)-4,5-dihydro-1H-imidazol-1-yl)methanone (CAS 851865-10-6)
- MeOSuc-Val-Val-Ile-Ala-pNA (CAS 201737-55-5)
- 1-Benzyl-3-(1,4-dioxaspiro[4.5]Dec-7-en-8-yl)-1H-indole (CAS 882747-57-1)
- 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thieno[2,3-b]pyridine (CAS 1034579-02-6)
- n-(3-(1h-Imidazol-1-yl)propyl)-4,5-dibromothiophene-2-carboxamide (CAS 95059-47-5)
- 4-Methyl-2-(4-(pyrrolidin-1-yl)quinolin-2-yl)thiazole (CAS 853333-52-5)
- Losartan Impurity 61 (CAS CATO-C4X-168361)
- Semaglutide impurity 206 (CAS CATO-C4X-2226206)
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