1,1-Dimethyl-3-oxo-1,3-dihydro-2-benzofuran-5-carboxylic acid CAS 1428-81-5
| CAS No. | 1428-81-5 |
| Molecular Formula | C11H10O4 |
| Molecular Weight | 206.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1,1-Dimethyl-3-oxo-1,3-dihydro-2-benzofuran-5-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.
CATO supplies 1,1-Dimethyl-3-oxo-1,3-dihydro-2-benzofuran-5-carboxylic acid (CAS 1428-81-5), a certified reference material (molecular formula C11H10O4, MW 206.19 g/mol) for analytical method development and quality control.
1,1-Dimethyl-3-oxo-1,3-dihydro-2-benzofuran-5-carboxylic acid (C11H10O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
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 | C11H10O4 |
| Molecular Weight | 206.19 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.) | 1957 |
Related Dimethyl Standards
- 2,2-Dimethyl-3-oxo-2,3-dihydrobenzofuran-5-carboxylic acid (CAS 103989-70-4)
- 1,1-dimethyl-3-oxo-1,3-dihydro-2-benzofuran-4-carboxylic acid (CAS 16224-86-5)
- 3,3-Dimethyl-1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid (CAS 168060-86-4)
- 5,5-Dimethyl-1,3-dioxan-2-one (CAS 3592-12-9)
- dimethyl 2,3-dimethoxybutanedioate (CAS 56145-21-2)
- 3,3-Dimethyl-6-nitroindolin-2-one (CAS 100510-64-3)
- 3,3-Dimethyl-5-nitroindolin-2-one (CAS 100511-00-0)
- 5-(1,3-Dimethyl-1h-pyrazol-4-yl)-1h-pyrazole-3-carboxylic acid (CAS 1030620-57-5)
Recommended Standards
- 6-Methoxy-4-methyl-1-benzofuran-2-carboxylic acid (CAS 1427427-80-2)
- Methyl 3-(4-hydroxy-3-methoxyphenyl)propiolate (CAS 144256-17-7)
- Ethyl 2,2-difluoro-2-(3-oxocyclopentyl)acetate (CAS 1423034-15-4)
- 7-Methoxy-5-methylbenzofuran-3-carboxylic acid (CAS 1485985-19-0)
- Sodium Hexadecanoate-6,6,6-d (CAS 10051-44-2)
- Isocarbofos (CAS 24353-61-5)
- 1-sec-butyl-4-chloro-1H-pyrazole-5-carboxylic acid (CAS 1006493-92-0)
- (S)-6-Chloro-N-(pyrrolidin-2-ylmethyl)pyridin-3-amine (CAS 327603-71-4)
- 2-((5-Chloro-7-iodoquinolin-8-yl)oxy)ethyl acetate (CAS 73511-39-4)
- 7-Iodoimidazo[1,2-a]pyridine (CAS 908269-30-7)
- N-(6-chloropyridin-3-yl)-3,4-difluorobenzamide (CAS 325457-89-4)
- 2-(5-(Azepan-1-ylmethyl)-1H-tetrazol-1-yl)acetic acid hydrochloride (CAS 1119449-90-9)
- 5-Methyl-4-phenyl-2-[3-(trifluoromethyl)phenyl]-2,3-dihydro-1H-pyrazol-3-one (CAS 400075-07-2)
- Semaglutide impurity 34 (CAS CATO-C4X-222634)
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