1-Oxo-1,3-dihydroisobenzofuran-4-carboxylic acid CAS 4792-27-2
| CAS No. | 4792-27-2 |
| Molecular Formula | C9H6O4 |
| Molecular Weight | 178.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-Oxo-1,3-dihydroisobenzofuran-4-carboxylic acid.
CATO supplies 1-Oxo-1,3-dihydroisobenzofuran-4-carboxylic acid (CAS 4792-27-2), a certified reference material (molecular formula C9H6O4, MW 178.14 g/mol) for analytical method development and quality control.
1-Oxo-1,3-dihydroisobenzofuran-4-carboxylic acid (C9H6O4) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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-Oxo-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 | C9H6O4 |
| Molecular Weight | 178.14 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 Oxo Standards
- (5-Methyl-1,3-dihydroisobenzofuran-4-yl)boronic acid (CAS 2411789-43-8)
- (1-Oxo-1,3-dihydroisobenzofuran-5-yl)boronic acid (CAS 1345700-91-5)
- 1-Butyl-1,3-dihydroisobenzofuran (CAS 180068-03-5)
- 2-(1-Oxo-1,3-dihydroisobenzofuran-5-yl)acetaldehyde (CAS 1255207-11-4)
- 1,3-Dihydroisobenzofuran-5-carbonyl chloride (CAS 153967-93-2)
- 2-(3-Oxo-1,3-dihydroisobenzofuran-1-yl)acetonitrile (CAS 18327-98-5)
- 1-Oxo-1,3-dihydroisobenzofuran-5,6-dicarbonitrile (CAS 65975-31-7)
- (6-Methyl-1,3-dihydroisobenzofuran-5-yl)methanol (CAS 941600-62-0)
Recommended Standards
- 1-Methyl-1H-pyrido[2,3-d][1,3]oxazine-2,4-dione (CAS 53890-44-1)
- 2-(2-Nitrophenoxy)acetonitrile (CAS 31507-30-9)
- 1L-epi-2-Inosose (CAS 6623-68-3)
- 2-(4-Nitrophenoxy)acetonitrile (CAS 33901-46-1)
- 1,5-Dimethylpyrrolidine-2,4-dione triacetate (CAS 1624262-33-4)
- Ethyl 4-((benzyloxy)methyl)-2-(tetrahydro-2H-pyran-4-yl)-1H-imidazole-5-carboxylate (CAS 1245649-48-2)
- 2-Cyano-N-(5-nitro-1,3-benzothiazol-2-yl)acetamide (CAS 1072069-62-5)
- Ethyl 3-Chloro-6-cyanopyridine-2-carboxylate (CAS 1436504-94-7)
- 2-(3-tert-butyl-1,2,4-oxadiazol-5-yl)-4-chloroaniline (CAS 1040008-46-5)
- Tepotinib impurity 18 (CAS CATO-C4X-337418)
- (2,6-Difluorobenzoyl)-l-valine (CAS 956684-24-5)
- 2-(3-((2-Fluorobenzyl)oxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2246811-02-7)
- (4-Methylcyclohexyl)(pyridin-3-yl)methanamine (CAS 1247371-82-9)
- D-Lys20-Tirzepatide (CAS CATO-CPTD788914)
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