| CAS No. | 85342-65-0 |
| Molecular Formula | C8HCl4NO3 |
| Molecular Weight | 300.91 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 300.91 g/mol gives 4,5,6,7-Tetrachloro-2-hydroxy-isoindole-1,3-dione 85342-65-0 KS-0000191P distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4,5,6,7-Tetrachloro-2-hydroxy-isoindole-1,3-dione 85342-65-0 KS-0000191P (CAS 85342-65-0), molecular formula C8HCl4NO3 and molecular weight 300.91 g/mol, is a CATO reference standard with documented purity and traceability.
4,5,6,7-Tetrachloro-2-hydroxy-isoindole-1,3-dione 85342-65-0 KS-0000191P (C8HCl4NO3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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.
As a certified reference material (CRM), 4,5,6,7-Tetrachloro-2-hydroxy-isoindole-1,3-dione 85342-65-0 KS-0000191P 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.
| Molecular Formula | C8HCl4NO3 |
| Molecular Weight | 300.91 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |