9H-carbazole-2,7-dicarboxylic acid CAS 1409971-87-4
| CAS No. | 1409971-87-4 |
| Molecular Formula | C14H9NO4 |
| Molecular Weight | 255.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
9H-carbazole-2,7-dicarboxylic acid (CAS 1409971-87-4) is a high-purity analytical reference standard with the molecular formula C14H9NO4 and a molecular weight of 255.23 g/mol.
Structurally, 9H-carbazole-2,7-dicarboxylic acid (C14H9NO4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 255.23 g/mol, it falls into the medium-molecular-weight range. 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).
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.
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 | C14H9NO4 |
| Molecular Weight | 255.23 g/mol |
| Appearance | Pale yellow to 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 1 |
Related H Standards
- 9H-carbazole-3,6-dicarboxylic acid (CAS 3215-41-6)
- 1,1'-(9H-Carbazole-3,6-diyl)bis(ethan-1-one) (CAS 3403-70-1)
- 1,1'-(9H-Carbazole-3,9-diyl)diethanone (CAS 92855-55-5)
- 9H-Carbazole-3-sulfonyl chloride (CAS 21421-43-2)
- 9H-Carbazole 3-Oxoacetic Acid (CAS 1094264-08-0)
- 9H-Carbazole, 3-bromo-9-ethenyl-, homopolymer (CAS 32072-08-5)
- Carbazole-9-carbonyl Chloride (CAS 73500-82-0)
- Carbazole-3-boronic Acid Pinacol Ester (CAS 855738-89-5)
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