3-Hydroxy-2-oxo-2H-pyran-6-carboxylic acid CAS 93905-59-0
| CAS No. | 93905-59-0 |
| Molecular Formula | C6H4O5 |
| Molecular Weight | 156.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Hydroxy-2-oxo-2H-pyran-6-carboxylic acid (CAS 93905-59-0) is a high-purity analytical reference standard with the molecular formula C6H4O5 and a molecular weight of 156.09 g/mol.
The molecular framework of 3-Hydroxy-2-oxo-2H-pyran-6-carboxylic acid (C6H4O5) is characterized by a carbohydrate-derived structure. 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 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), 3-Hydroxy-2-oxo-2H-pyran-6-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 | C6H4O5 |
| Molecular Weight | 156.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
Related Hydroxy Standards
- 4-Hydroxy-2-oxo-2H-pyran-6-carboxylic Acid (CAS 108298-44-8)
- 3-Hydroxy-4-oxo-4H-pyran-2-carboxylic acid (CAS 89324-45-8)
- 4-Hydroxy-6-oxo-1,6-dihydropyridazine-3-carboxylic acid (CAS 1442437-21-9)
- 6-Hydroxy-5-nitropyridin-2(1H)-one (CAS 16013-84-6)
- 4-Hydroxy-6-oxo-5,6-dihydropyridazine-3-carboxylic Acid (CAS 1823277-97-9)
- 3-Hydroxy-4-nitropyridine 1-oxide (CAS 19355-03-4)
- 2-Hydroxy-4-nitro-1H-pyrrole-3-carbaldehyde (CAS 263144-36-1)
- 4-Hydroxy-2-nitro-1H-pyrrole-3-carbaldehyde (CAS 263144-33-8)
Recommended Standards
- 3,4-Furandicarboxylic Acid (CAS 3387-26-6)
- (1R,5S,6r)-2,4-dioxo-3-oxabicyclo[3.1.0]Hexane-6-carboxylic acid (CAS 187681-87-4)
- 5,6-Difluorobenzo[c][1,2,5]oxadiazole (CAS 761427-85-4)
- 2,6-Dioxo-3,6-dihydro-2h-pyran-4-carboxylic acid (CAS 14556-16-2)
- 2-(Amino(4-bromophenyl)methyl)naphthalen-1-ol hydrochloride (CAS 736173-16-3)
- 2-(5-Hydroxy-1,3-dihydroisobenzofuran-1-yl)acetic acid (CAS 1956327-38-0)
- 2-Bromo-5-(chloromethyl)-4-(difluoromethyl)-3-(trifluoromethyl)pyridine (CAS 1806914-00-0)
- 2-(3,4-Dimethylphenoxy)ethanol (CAS 34221-43-7)
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