| CAS No. | 28871-62-7 |
| Molecular Formula | C8H8O5 |
| Molecular Weight | 184.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 184.15 g/mol gives (exo,exo)-7-Oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(exo,exo)-7-Oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (CAS 28871-62-7) is a high-purity analytical reference standard with the molecular formula C8H8O5 and a molecular weight of 184.15 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, (exo,exo)-7-Oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 184.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
| Molecular Formula | C8H8O5 |
| Molecular Weight | 184.15 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 |
| 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.) | 1965 |