(2S,3R,4S,5R,6R)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate CAS 19940-17-1
| CAS No. | 19940-17-1 |
| Molecular Formula | C13H20O8 |
| Molecular Weight | 304.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
(2S,3R,4S,5R,6R)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate (CAS 19940-17-1), molecular formula C13H20O8 and molecular weight 304.29 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (2S,3R,4S,5R,6R)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate (C13H20O8) 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 304.29 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C13H20O8 |
| Molecular Weight | 304.29 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.) | 1962 |
Recommended Standards
- (2R,3S,4R,5R,6S)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate (CAS 24333-02-6)
- (2S,3R,4S,5S,6R)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate (CAS 43139-93-1)
- (2R,3S)-2-(3,4-Dihydroxyphenyl)-3-methoxychroman-5,7-diol (CAS 65350-86-9)
- (2S,3S,4R,5R,6S)-2-methoxy-6-methyltetrahydro-2H-pyran-3,4,5-triyl triacetate (CAS 24332-97-6)
- ethyl 3-(6-chloro-3-pyridyl)-1-(iodomethyl)-2-oxabicyclo[2.2.2]octane-4-carboxylate (CAS 2703779-12-6)
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