Diethyl 3-methylcyclobutane-1,1-dicarboxylate CAS 20939-62-2
| CAS No. | 20939-62-2 |
| Molecular Formula | C11H18O4 |
| Molecular Weight | 214.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Diethyl 3-methylcyclobutane-1,1-dicarboxylate (C11H18O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 214.26 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).
CATO supplies Diethyl 3-methylcyclobutane-1,1-dicarboxylate (CAS 20939-62-2), a certified reference material (molecular formula C11H18O4, MW 214.26 g/mol) for analytical method development and quality control.
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), Diethyl 3-methylcyclobutane-1,1-dicarboxylate 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 | C11H18O4 |
| Molecular Weight | 214.26 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
Related Diethyl Standards
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Recommended Standards
- Diethyl cyclopentane-1,1-dicarboxylate (CAS 4167-77-5)
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- dimethyl 1,3-dimethylcyclopentane-1,3-dicarboxylate (CAS 546101-12-6)
- Dimethyl 2-cyclohexylmalonate (CAS 49769-76-8)
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