Maleic Acid Monoamide CAS 557-24-4
| CAS No. | 557-24-4 |
| Molecular Formula | C4H5NO3 |
| Molecular Weight | 115.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Maleic Acid Monoamide is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Maleic Acid Monoamide (CAS 557-24-4), molecular formula C4H5NO3 and molecular weight 115.09 g/mol, is a CATO reference standard with documented purity and traceability.
Maleic Acid Monoamide (C4H5NO3) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C4H5NO3 |
| Molecular Weight | 115.09 g/mol |
| Purity | >95% |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Maleic Standards
- Maleic Acid (CAS 110-16-7)
- Maleic Acid-2,3-d (CAS 24661-33-4)
- Maleic-2,3-d2 Acid (CAS 24461-33-4)
- Maleic Hydrazide (CAS 123-33-1)
- Maleic anhydride-<SUP>13</SUP>C<SUB>4</SUB> (CAS 1161736-58-8)
- Maleic-2,3-d2 Anhydride (CAS 33225-51-3)
- Maleic Anhydride (CAS 108-31-6)
- 15519-86-5 Maleic Acid Monoethanolamide N-(2-Hydroxyethyl)maleamic Acid (CAS 15519-86-5)
Recommended Standards
- morpholine-2,5-dione (CAS 34037-21-3)
- 3-Amino-4-methoxy-1,2,5-oxadiazol 4-methoxy-1,2,5-oxadiazol-3-amine 78350-48-8 (CAS 78350-48-8)
- morpholine-2,3-dione (CAS 86310-85-2)
- N-Nitroso Imidazolidone (CAS 3844-63-1)
- 67385-09-5 N-(tert-Butoxycarbonyl)-2-aminoethanethiol Carbamic acid, (2-mercaptoethyl)-, 1,1-dimethylethyl ester N-Boc-aet (CAS 67385-09-5)
- (1-Butyl-1H-indol-5-yl)methanamine (CAS 1339568-69-2)
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