2,6-Dioxo-3,6-dihydro-2h-pyran-4-carboxylic acid CAS 14556-16-2
| CAS No. | 14556-16-2 |
| Molecular Formula | C6H4O5 |
| Molecular Weight | 156.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,6-Dioxo-3,6-dihydro-2h-pyran-4-carboxylic acid (CAS 14556-16-2) is a high-purity analytical reference standard with the molecular formula C6H4O5 and a molecular weight of 156.09 g/mol.
2,6-Dioxo-3,6-dihydro-2h-pyran-4-carboxylic acid (C6H4O5) contains a carbohydrate-derived structure. 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), 2,6-Dioxo-3,6-dihydro-2h-pyran-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 | 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.) | 1961 |
Related Dioxo Standards
- 1-Methyl-4,5-dioxo-4,5-dihydro-1H-pyrazole-3-carboxylic acid (CAS 197652-34-9)
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Recommended Standards
- 4-Hydroxy-2-oxo-2H-pyran-6-carboxylic Acid (CAS 108298-44-8)
- (1R,5S,6r)-2,4-dioxo-3-oxabicyclo[3.1.0]Hexane-6-carboxylic acid (CAS 187681-87-4)
- 3,5-Difluoro-6-oxo-1,6-dihydropyridine-2-carbonitrile (CAS 1049678-65-0)
- 3,4-Furandicarboxylic Acid (CAS 3387-26-6)
- 2-(3-Chloro-4-(cyclopropylmethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1860005-05-5)
- Pyrimidine-2,4,6-tricarbaldehyde (CAS 1209493-65-1)
- 3-Chloro-N-(4-chloro-2-((5-chloropyridin-2-yl)carbamoyl)-6-methoxyphenyl)-4-((2-(methylamino)-1H-imidazol-1-yl)methyl)thiophene-2-carboxamide 2,2,2-trifluoroacetate (CAS 229340-73-2)
- (R)-tert-Butyl (pyrrolidin-3-ylmethyl)carbamate hydrochloride (CAS 1217858-20-2)
- (2-Bromo-4-(4-methyl-1H-pyrazol-1-yl)phenyl)boronic acid (CAS 2225176-04-3)
- 7-Fluoro-3,4-dihydro-2H-1,4-benzoxazine-6-boronic acid pinacol ester, 97% (CAS 1256255-84-1)
- Orlistat Impurity 17 (CAS CATO-C4X-149917)
- 2-Methyl-2-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanenitrile (CAS 1160502-10-2)
- 7-Bromo-5,8-dichloro-3,4-dihydroisoquinolin-1(2H)-one, 97% (CAS 1616289-35-0)
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