2-Chloro-5,6-dimethoxy-benzothiazole CAS 864169-35-7
| CAS No. | 864169-35-7 |
| Molecular Formula | C9H8ClNO2S |
| Molecular Weight | 229.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 229.68 g/mol gives 2-Chloro-5,6-dimethoxy-benzothiazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Chloro-5,6-dimethoxy-benzothiazole (CAS 864169-35-7) is a high-purity analytical reference standard with the molecular formula C9H8ClNO2S and a molecular weight of 229.68 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 2-Chloro-5,6-dimethoxy-benzothiazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 229.68 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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-Chloro-5,6-dimethoxy-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 | C9H8ClNO2S |
| Molecular Weight | 229.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-4,6-dimethoxybenzo[d]thiazole (CAS 1023559-29-6)
- 1-(3-Chloro-2-fluorobenzyl)pyrrolidin-3-ol (CAS 1044766-62-2)
- 4-(2-Chloro-4-fluorobenzyl)morpholine (CAS 114776-21-5)
- N-(3-chloro-4-fluorophenyl)tetrahydro-2H-pyran-4-amine (CAS 1157009-72-7)
- 3-Chloro-5,7-dimethoxybenzo[d]isothiazole (CAS 1184915-20-5)
- 2-Chloro-6,7-dimethoxybenzo[d]thiazole (CAS 1188246-96-9)
- (R)-1-(2-Chloro-6-fluorobenzyl)pyrrolidin-3-ol (CAS 1261234-77-8)
- (S)-1-(2-Chloro-6-fluorobenzyl)pyrrolidin-3-ol (CAS 1289585-19-8)
Recommended Standards
- 2-Chloro-4,7-dimethoxy-1,3-benzothiazole (CAS 890091-99-3)
- 2-chloro-N-(3-fluorobenzyl)-N-methylpropanamide (CAS 852399-84-9)
- 1-Methyl-1h-indole-7-sulfonyl chloride (CAS 941716-95-6)
- 2-Chloro-N-(4-fluorophenyl)-N-isopropylacetamide (CAS 66602-64-0)
- (2,2-Dimethoxycyclobutyl)methanol (CAS 1638760-19-6)
- Tert-butyl 4-(1-(3-fluorobenzyl)-2-oxo-1,2,3,4-tetrahydroquinazolin-5-yl)piperazine-1-carboxylate (CAS 1211312-10-5)
- 3-(Vinyloxy)benzaldehyde (CAS 83228-39-1)
- 2-(((4-Hydroxyquinazolin-2-yl)methyl)thio)acetic acid (CAS 890647-62-8)
- R,R-Anhydrous EP Impurity E (CAS CATO-C4X-103565)
- 2-(Chloromethyl)-5-(difluoromethyl)-3-iodopyridine (CAS 1806039-58-6)
- 3-(5-Amino-3-(furan-2-yl)-1H-pyrazol-1-yl)tetrahydrothiophene 1,1-dioxide (CAS 956329-25-2)
- 2-Hydroxy-2-(naphthalen-1-yl)propanoic acid (CAS 6341-58-8)
- 2-(3-bromo-2-hydroxypyridin-4-yl)acetic acid (CAS 1227563-14-5)
- (Leu31,Pro34)-Peptide YY (human) trifluoroacetate salt (CAS 179986-95-9)
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