4-Aminonaphthalene-1,2-dione hemihydrate CAS 20814-38-4
| CAS No. | 20814-38-4 |
| Molecular Formula | 2*C10H7NO2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Aminonaphthalene-1,2-dione hemihydrate 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.
CATO supplies 4-Aminonaphthalene-1,2-dione hemihydrate (CAS 20814-38-4), a certified reference material (molecular formula C10H7NO2H2O, MW 191.19 g/mol) for analytical method development and quality control.
4-Aminonaphthalene-1,2-dione hemihydrate (C10H7NO2H2O) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | 2*C10H7NO2 H2O |
| Molecular Weight | 191.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Aminonaphthalene Standards
- 8-Aminonaphthalene-1,3,6-trisulfonic acid (CAS 117-42-0)
- 6-Aminonaphthalene-1,3-disulfonic acid (CAS 118-33-2)
- 5-Aminonaphthalene-1-sulfonamide hydrochloride (CAS 1215328-08-7)
- 2-Aminonaphthalene-3-carbonyl chloride (CAS 1261768-07-3)
- 1-Aminonaphthalene-4-acetonitrile (CAS 1261799-00-1)
- 1-Aminonaphthalene-6-carboxylic acid ethyl ester (CAS 127810-67-7)
- 6-aminonaphthalene-2-carbonitrile (CAS 129667-70-5)
- 5-Aminonaphthalene-1,3-disulfonic acid (CAS 13306-42-8)
Recommended Standards
- 2-(2-Bromocyclopropyl)ethan-1-ol (CAS 97535-45-0)
- Methyl 5-cyano-2-mercaptobenzoate (CAS 1824581-95-4)
- 4-[2-(Trimethylsilyl)ethynyl]pyrene (CAS 600168-40-9)
- 1-(Thiazol-2-yl)piperidin-4-amine (CAS 596818-05-2)
- (R)-1-(4-isopropylfuran-2-yl)propan-1-amine (CAS 473733-02-7)
- 1-(tert-Butyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 773865-05-7)
- 4-Chloro-3-isopropylbenzonitrile (CAS 1349716-25-1)
- 6-Bromo-5-fluoro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (CAS 1286734-76-6)
- (R)-Methyl 2-amino-3-mercapto-3-methylbutanoate (CAS 149207-23-8)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
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