4-Oxo-4,5-dihydro-1,2,5-oxadiazole-3-carboxylic acid CAS 66313-36-8
| CAS No. | 66313-36-8 |
| Molecular Formula | C3H2N2O4 |
| Molecular Weight | 130.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-Oxo-4,5-dihydro-1,2,5-oxadiazole-3-carboxylic acid (CAS 66313-36-8), a certified reference material (molecular formula C3H2N2O4, MW 130.06 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, an ether linkage, 4-Oxo-4,5-dihydro-1,2,5-oxadiazole-3-carboxylic acid is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 130.06 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 4-Oxo-4,5-dihydro-1,2,5-oxadiazole-3-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C3H2N2O4 |
| Molecular Weight | 130.06 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1975 |
| Nitrogen Atoms | 2 |
Related Oxo Standards
- 5-Oxo-2,5-dihydro-1,2,4-oxadiazole-3-carboxylic acid (CAS 1257265-24-9)
- 5,6-Dihydro-1,4-dioxine-2-carboxylic acid (CAS 61564-98-5)
- 5-Oxo-2,5-dihydro-1H-pyrazole-3-carboxylic Acid (CAS 37832-55-6)
- 2-Methyl-3,4-dihydro-2H-pyran-3,4-diol (CAS 53657-42-4)
- 2,5-Dihydro-2,5-dimethoxyfuran (CAS 332-77-4)
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Recommended Standards
- 4-Nitro-1,2,5-oxadiazol-3-amine (CAS 66328-69-6)
- 5-Nitro-1,3,4-oxadiazol-2-amine (CAS 728948-45-6)
- 4-Carboxy-1,2,5-oxadiazole 2-oxide (CAS 153309-86-5)
- Niacin-<SUP>13</SUP>C<SUB>6</SUB> (CAS 1189954-79-7)
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- prop-2-ynylsulfonylbenzene (CAS 2525-40-8)
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- 3-Cyanophenylboronic acid MIDA ester (CAS 1783851-72-8)
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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