Diethyl 2-(5-oxodihydrofuran-2(3H)-ylidene)malonate CAS 85152-95-0
| CAS No. | 85152-95-0 |
| Molecular Formula | C11H14O6 |
| Molecular Weight | 242.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Diethyl 2-(5-oxodihydrofuran-2(3H)-ylidene)malonate (CAS 85152-95-0), molecular formula C11H14O6 and molecular weight 242.23 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Diethyl 2-(5-oxodihydrofuran-2(3H)-ylidene)malonate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 242.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), Diethyl 2-(5-oxodihydrofuran-2(3H)-ylidene)malonate 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 | C11H14O6 |
| Molecular Weight | 242.23 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, 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.) | 1981 |
Related Diethyl Standards
- Diethyl 4,5-dioxocyclopentane-1,3-dicarboxylate (CAS 10088-87-6)
- Diethyl 4,5-dihydroxycyclopenta-3,5-diene-1,3-dicarboxylate (CAS 103008-86-2)
- Diethyl(4-formylphenyl)phosphonate (CAS 72436-45-4)
- Diethyl (1-Phenylethyl)phosphonate (CAS 33973-48-7)
- Diethyl (2,4-dimethylphenyl)phosphonate (CAS 58983-20-3)
- Diethyl (2,6-dimethylphenyl)phosphonate (CAS 54057-96-4)
- Diethyl (2-methylbenzyl)phosphonate (CAS 62778-16-9)
- diethyl (3,5-dimethylphenyl)phosphonate (CAS 79238-62-3)
Recommended Standards
- Di(prop-2-yn-1-yl) terephthalate (CAS 4631-69-0)
- Dimethyl 2-(4,4-dimethyl-2-oxodihydrofuran-3(2H)-ylidene)malonate (CAS 71817-25-9)
- Butyl (3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazin-6-yl)glycinate (CAS 307524-88-5)
- Dimethyl 2,5-diethynylterephthalic acid (CAS 944458-59-7)
- 4'-Acetyl[1,1'-biphenyl]-2-carbaldehyde (CAS 150970-51-7)
- 3-((3-Fluorophenoxy)methyl)azetidine hydrochloride (CAS 1864054-18-1)
- 1-(Bromomethyl)-3-methylnaphthalene (CAS 64977-27-1)
- (3-Chloropropyl)cyclopentane (CAS 119507-55-0)
- 3-(4-Methoxybenzyl)-6-(thiophen-2-yl)isoxazolo[5,4-b]pyridine-4-carboxylic acid (CAS 1263208-99-6)
- Ethyl 4-aminopiperidine-4-carboxylate (CAS 57611-99-1)
- trans-1,4-Cyclohexanediol (CAS 6995-79-5)
- 4-Bromo-3-fluoro-2-nitropyridine (CAS 1805578-63-5)
- N-(Prop-2-yn-1-yloxy)-2,5-bis(2,2,2-trifluoroethoxy)benzamide (CAS 338395-00-9)
- Semaglutide impurity 259 (CAS CATO-C4X-2226259)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com