4-Methoxy-1,2,5-oxadiazole-3-carboxylic acid CAS 1369245-82-8
| CAS No. | 1369245-82-8 |
| Molecular Formula | C4H4N2O4 |
| Molecular Weight | 144.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-Methoxy-1,2,5-oxadiazole-3-carboxylic acid (C4H4N2O4) contains a carbohydrate-derived structure, an amide group. 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 144.09 g/mol, it falls into the low-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
4-Methoxy-1,2,5-oxadiazole-3-carboxylic acid (CAS 1369245-82-8), molecular formula C4H4N2O4 and molecular weight 144.09 g/mol, is a CATO reference standard with documented purity and traceability.
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.
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.
Physical & Chemical Properties
| Molecular Formula | C4H4N2O4 |
| Molecular Weight | 144.09 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.) | 1991 |
| Nitrogen Atoms | 2 |
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- (S)-2-phenylazetidine (CAS 1956300-02-9)
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- 1-(4-Butoxybenzoyl)-4-{[3-(4-fluorophenyl)-1,2,4-oxadiazol-5-yl]methyl}piperidine (CAS 1775302-57-2)
- tert-butyl 1,8-diazaspiro[5.5]undecane-1-carboxylate hydrochloride (CAS 1909316-16-0)
- (2R,3S,4R)-4-((tert-Butyldiphenylsilyl)oxy)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-3,4-dihydro-2H-pyran-3-yl acetate (CAS 342029-19-0)
- Peptide 74 (H-8545.0500) (CAS 132116-39-3)
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