5-Hydroxy-4H-1-benzopyran-4-one CAS 3952-69-0
| CAS No. | 3952-69-0 |
| Molecular Formula | C9H6O3 |
| Molecular Weight | 162.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Hydroxy-4H-1-benzopyran-4-one is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Hydroxy-4H-1-benzopyran-4-one (CAS 3952-69-0), molecular formula C9H6O3 and molecular weight 162.14 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Hydroxy-4H-1-benzopyran-4-one (C9H6O3) 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Hydroxy-4H-1-benzopyran-4-one 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 | C9H6O3 |
| Molecular Weight | 162.14 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 Hydroxy Standards
- 3-Hydroxy-2-ureido-butyric acid (CAS 122331-32-2)
- 5-hydroxy-2,3-dihydro-1H-indene-1,3-dione (CAS 131977-61-2)
- 3-Hydroxy-4H-chromen-4-one (CAS 13400-26-5)
- (R)-4-Hydroxy-5-methoxy-5-oxopentanoic acid (CAS 2165747-14-6)
- 2-Hydroxy-5H-chromen-5-one (CAS 32942-76-0)
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Recommended Standards
- 5-Hydroxybenzofuran-2-carbaldehyde (CAS 64418-91-3)
- 4-Methylisobenzofuran-1,3-dione (CAS 4792-30-7)
- 5-Hydroxybenzofuran-4-carbaldehyde (CAS 59254-30-7)
- 4-Hydroxybenzofuran-7-carbaldehyde (CAS 59254-29-4)
- 3-(2-(4-Bromophenyl)-2-oxoethyl)-1-methylimidazolidine-2,4-dione (CAS 1031151-09-3)
- 4-Isocyano-2-(trifluoromethyl)benzonitrile (CAS 1067225-62-0)
- 4-[4-(chloromethyl)-1,3-thiazol-2-yl]benzamide (CAS 1094402-62-6)
- 3,5-Dihydroxy-4-methoxybenzaldehyde (CAS 29865-85-8)
- 4-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]piperidine hydrochloride (CAS 1351499-82-5)
- Decahydro-2,7-naphthyridine (CAS 885270-20-2)
- 2-(4-Chlorophenoxy)-2-methyl-N-(4-(N-(thiazol-2-yl)sulfamoyl)phenyl)propanamide (CAS 587843-16-1)
- 6,7-Dihydro-4H-pyrano[3,4-d]oxazole-2-carboxylic acid, lithium salt (CAS 2306263-59-0)
- (5-Cyclopropyl-2-isopropylpyridin-3-yl)boronic acid (CAS 2225174-52-5)
- Des-Tyr10-Tirzepatide (CAS CATO-CPTD788680)
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