4-(Methylamino)naphthalene-1,2-dione CAS 57404-51-0
| CAS No. | 57404-51-0 |
| Molecular Formula | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(Methylamino)naphthalene-1,2-dione 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.
4-(Methylamino)naphthalene-1,2-dione (CAS 57404-51-0), molecular formula C11H9NO2 and molecular weight 187.19 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H9NO2, 4-(Methylamino)naphthalene-1,2-dione contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 187.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 1 |
Related Methylamino Standards
- 2-(Methylamino)naphthalene-1,4-dione (CAS 14423-00-8)
- 4-(Methylamino)quinazoline-6-carbaldehyde (CAS 648449-04-1)
- 2-(Methylamino)benzenesulfonic acid (CAS 70916-29-9)
- 2-(Methylamino)pyridine-3-sulfonamide (CAS 70661-79-9)
- 4-(Methylamino)benzenesulfonic acid (CAS 24447-99-2)
- Methyl 2-(methylamino)-2-(tetrahydro-2h-pyran-4-yl)acetate (CAS 1250825-67-2)
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- 2-Butyl-5-(methylamino)-1,2,4-thiadiazol-3(2H)-one (CAS 1365940-70-0)
Recommended Standards
- 4-(Difluoromethoxy)phenethylamine (CAS 771581-14-7)
- 4-(Morpholin-4-yl)-4-oxobutanoic acid (CAS 67900-19-0)
- 4-(Difluoromethoxy)-3,5-dimethylaniline (CAS 87310-15-4)
- 4-(Prop-2-yn-1-yl)-2h-benzo[b][1,4]oxazin-3(4h)-one (CAS 37988-92-4)
- Thiophen-5-d-2-amine (CAS 1185309-42-5)
- 4,5-Dihydro-1,2-oxazole-3-carbonitrile (CAS 65150-73-4)
- Fmoc-α-Me-Leu-OH (CAS 312624-65-0)
- N-cyclopropyl-1-(piperidin-4-yl)-1H-1,2,3-triazole-4-carboxamide (CAS 1408746-76-8)
- 3-Chlorosulfonylindole-2-carboxylic acid ethylester (CAS 1171918-03-8)
- Methyl 3-cyano-4-(trifluoromethyl)benzoate (CAS 1804461-29-7)
- N-cyclopropyl-4-methyl-3,6-dihydropyridine-1(2H)-carboxamide (CAS 1427992-72-0)
- 3,5-Bis(2,4-dimethoxyphenyl)-1H-pyrazole (CAS 1228933-23-0)
- 4-FLuoro-4'-(trifluoromethoxy)biphenyl-3-carboxylic acid methyl ester (CAS 1261744-05-1)
- Semaglutide Impurity 121 X Sodium Salt (CAS CATO-C4X-2226121)
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