4-Isocyanobutyric acid methyl ester CAS 51642-06-9
| CAS No. | 51642-06-9 |
| Molecular Formula | C6H9NO2 |
| Molecular Weight | 127.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Isocyanobutyric acid methyl ester (C6H9NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
4-Isocyanobutyric acid methyl ester (CAS 51642-06-9), molecular formula C6H9NO2 and molecular weight 127.14 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C6H9NO2 |
| Molecular Weight | 127.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 4-isocyanatooxane (CAS 53035-92-0)
- 4-Isopropyloxazol-5(4H)-one (CAS 4526-83-4)
- 4-hydroxyoxane-4-carbonitrile (CAS 50289-10-6)
- 4-methoxy-1-methyl-2,5-dihydro-1H-pyrrol-2-one (CAS 90968-33-5)
- 2-Hydroxy-5-methylphenyl β-D-glucopyranosiduronic Acid (CAS 117591-51-2)
- 5-Methyl-3-(2-nitrophenyl)isoxazole (CAS 926316-89-4)
- ethyl 3-amino-1-methyl-1H-pyrazole-4-carboxylate (CAS 21230-43-3)
- 2-(4-Chloro-2-fluoro-5-methoxyphenyl)-4-(difluoromethyl)-2,4-dihydro-5-methyl-3H-1,2,4-triazol-3-one (CAS 97986-18-0)
- 1-(pyridin-2-yl)-1H-1,2,3,4-tetrazol-5-amine (CAS 76105-83-4)
- Efavirenz Impurity 4 (CAS 174819-21-7)
- 5-(4-Methoxyphenyl)-2H-tetrazole (CAS 6926-51-8)
- 532-31-0 Benzoic acid, silver(1+) salt NSC-88938 NSC88938 Silver benzoate Silver benzoate (AgOBz), AgOBz Silver benzoate, AgOBz Silver(1+) benzoate (CAS 532-31-0)
- (2S)-N-Methoxy-N,2-dimethylhexanamide-d3 (CAS 1330165-35-9)
- Semaglutide Impurity 138 (CAS CATO-C4X-2226138)
Why CATO?
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