2,4-dichloro-7-nitro-1,3-benzothiazole CAS 70200-91-8
| CAS No. | 70200-91-8 |
| Molecular Formula | C7H2Cl2N2O2S |
| Molecular Weight | 249.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 249.07 g/mol gives 2,4-dichloro-7-nitro-1,3-benzothiazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,4-dichloro-7-nitro-1,3-benzothiazole (CAS 70200-91-8) is a high-purity analytical reference standard with the molecular formula C7H2Cl2N2O2S and a molecular weight of 249.07 g/mol.
Based on its molecular formula C7H2Cl2N2O2S, 2,4-dichloro-7-nitro-1,3-benzothiazole contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 249.07 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 2,4-dichloro-7-nitro-1,3-benzothiazole 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.
Physical & Chemical Properties
| Molecular Formula | C7H2Cl2N2O2S |
| Molecular Weight | 249.07 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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