Dimethyl 4-methoxyisoxazole-3,5-dicarboxylate CAS 90222-95-0
| CAS No. | 90222-95-0 |
| Molecular Formula | C8H9NO6 |
| Molecular Weight | 215.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Dimethyl 4-methoxyisoxazole-3,5-dicarboxylate.
Dimethyl 4-methoxyisoxazole-3,5-dicarboxylate (CAS 90222-95-0), molecular formula C8H9NO6 and molecular weight 215.16 g/mol, is a CATO reference standard with documented purity and traceability.
Dimethyl 4-methoxyisoxazole-3,5-dicarboxylate (C8H9NO6) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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), Dimethyl 4-methoxyisoxazole-3,5-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 | C8H9NO6 |
| Molecular Weight | 215.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
Related Dimethyl Standards
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Recommended Standards
- 5,5-difluoro-1,3-dimethyl-7H-pyrazolo[3,4-b]pyridine-4,6-dione (CAS 2920637-33-6)
- Ornidazole Impurity 63 (CAS 1452323-31-7)
- 2,4,6-Trimethoxy-5-nitropyrimidine (CAS 83356-02-9)
- 2-(2-Methoxy-5-(trifluoromethyl)phenyl)acetonitrile (CAS 1000542-90-4)
- (R)-3-Methyl-piperidine x HCl, 98%ee, 98% (CAS 223792-48-1)
- N-(2-Morpholino-2-(thiophen-3-yl)ethyl)benzamide (CAS 946328-04-7)
- 2-(3,5-Dichlorophenyl)-2-hydroxyacetic acid (CAS 35599-94-1)
- Nabumetone Impurity 8 (CAS 5672-98-0)
- 2-((Dimethyl(oxo)-lambda6-sulfanylidene)amino)benzoic acid (CAS 2060036-80-6)
- 4-Chloro-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid (CAS 811450-35-8)
- 6-(4-Chloro-3-methylphenyl)-8-methyl-4-oxo-1,4-dihydrocinnoline-3-carboxylic acid (CAS 36991-84-1)
- ({2-[(4-methylphenyl)sulfanyl]ethyl}carbamoyl)methyl 4-hydroxybenzoate (CAS 879320-34-0)
- (3A'R,5'R,6a'S)-5'-((R)-1,4-dioxaspiro[4.5]Decan-2-yl)dihydrospiro[cyclohexane-1,2'-furo[2,3-d][1,3]dioxol]-6'(5'H)-one (CAS 18546-21-9)
- Neuropeptide Y, human (CAS 98264-90-5)
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