1H,8-cd]pyran-1,3-dione, 6-nitro- 4-Nitro-1,8-naphthalic acid anhydride 4-Nitro-1,8-naphthalic anhydride 4-Nitronaphthalene-1,8-dicarboxylic anhydride 4-Nitronaphthalic anhydride 6642-29-1 NSC-15356 NSC15356 Naphthalic anhydride, 4-nitro- CAS 6642-29-1
| CAS No. | 6642-29-1 |
| Molecular Formula | C12H15NO5 |
| Molecular Weight | 253.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
1H,8-cd]pyran-1,3-dione, 6-nitro- 4-Nitro-1,8-naphthalic acid anhydride 4-Nitro-1,8-naphthalic anhydride 4-Nitronaphthalene-1,8-dicarboxylic anhydride 4-Nitronaphthalic anhydride 6642-29-1 NSC-15356 NSC15356 Naphthalic anhydride, 4-nitro- (CAS 6642-29-1), molecular formula C12H15NO5 and molecular weight 253.25 g/mol, is a CATO reference standard with documented purity and traceability.
1H,8-cd]pyran-1,3-dione, 6-nitro- 4-Nitro-1,8-naphthalic acid anhydride 4-Nitro-1,8-naphthalic anhydride 4-Nitronaphthalene-1,8-dicarboxylic anhydride 4-Nitronaphthalic anhydride 6642-29-1 NSC-15356 NSC15356 Naphthalic anhydride, 4-nitro- (C12H15NO5) 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. 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 | C12H15NO5 |
| Molecular Weight | 253.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
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