| CAS No. | 53821-66-2 |
| Molecular Formula | C12H18O7 |
| Molecular Weight | 274.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 274.27 g/mol gives 3,4-Di-O-acetyl-1,2-O-isopropylidene-5-O-tosyl-a-L-sorbose distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3,4-Di-O-acetyl-1,2-O-isopropylidene-5-O-tosyl-a-L-sorbose (CAS 53821-66-2) is a high-purity analytical reference standard with the molecular formula C12H18O7 and a molecular weight of 274.27 g/mol.
Structurally, 3,4-Di-O-acetyl-1,2-O-isopropylidene-5-O-tosyl-a-L-sorbose (C12H18O7) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 274.27 g/mol, it falls into the medium-molecular-weight range. 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), 3,4-Di-O-acetyl-1,2-O-isopropylidene-5-O-tosyl-a-L-sorbose 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.
| Molecular Formula | C12H18O7 |
| Molecular Weight | 274.27 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |