3-amino-4-methoxycyclobut-3-ene-1,2-dione CAS 5231-88-9
| CAS No. | 5231-88-9 |
| Molecular Formula | C5H7NO3 |
| Molecular Weight | 129.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-amino-4-methoxycyclobut-3-ene-1,2-dione (CAS 5231-88-9), molecular formula C5H7NO3 and molecular weight 129.11 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 3-amino-4-methoxycyclobut-3-ene-1,2-dione is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 129.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-amino-4-methoxycyclobut-3-ene-1,2-dione 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 | C5H7NO3 |
| Molecular Weight | 129.11 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related amino Standards
- 4-Amino-4,5-dihydrofuran-2-carboxylic acid (CAS 96093-49-1)
- 4-Amino-6-hydroxy-5,6-dihydropyrimidin-2(1H)-one (CAS 10010-80-7)
- 2-Amino-2-(1H-tetrazol-5-yl)ethanol (CAS 1403765-05-8)
- 2-(5-Amino-2H-tetrazol-2-yl)ethan-1-ol (CAS 15284-30-7)
- 1-(4-Amino-1,2,5-oxadiazol-3-yl)ethanol (CAS 183537-70-4)
- 2-Amino-2-butenediamide (CAS 18486-76-5)
- (S)-3-Amino-5-methylimidazolidine-2,4-dione (CAS 220442-73-9)
- 3-Amino-1-methylimidazolidine-2,4-dione (CAS 26665-46-3)
Recommended Standards
- 3-Acetamidoacrylic acid (CAS 6627-63-0)
- 3-Hydroxy-3,4-dihydro-2H-pyrrole-5-carboxylic acid (CAS 9054-77-7)
- 3,5-Difluoroaniline (CAS 372-39-4)
- 3-Isonitroso-2,4-pentanedione (CAS 29917-12-2)
- <I>N</I>-Boc-3-aminothiophene (CAS 19228-91-2)
- (4-methylthiophen-3-yl)methanol (CAS 856937-69-4)
- 6-(Diphenylphosphino)hexanoic acid (CAS 59847-19-7)
- 3-Chloro-7-(1,1-difluoroethyl)quinoline (CAS 2387600-88-4)
- 2-Hydroxy-6-methylbenzamide (CAS 855366-12-0)
- 1-(5-Methyl-2-(methylthio)phenyl)ethan-1-one (CAS 1964-27-8)
- 3-Bromo-2-isobutoxy-5-methylpyridine (CAS 1255574-44-7)
- (R)-2-amino-2-(3,5-di-tert-butylphenyl)ethan-1-ol (CAS 1212938-91-4)
- 4-Methyl-3-(2-oxopropoxy)-6H-benzo[c]chromen-6-one (CAS 307551-49-1)
- [14-31]-Semaglutide (CAS CATO-C4X-2226262)
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