7-Chloro-2-methylbenzothiazole CAS 4146-25-2
| CAS No. | 4146-25-2 |
| Molecular Formula | C8H6ClNS |
| Molecular Weight | 183.66 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7-Chloro-2-methylbenzothiazole (CAS 4146-25-2), molecular formula C8H6ClNS and molecular weight 183.66 g/mol, is a CATO reference standard with documented purity and traceability.
7-Chloro-2-methylbenzothiazole (C8H6ClNS) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C8H6ClNS |
| Molecular Weight | 183.66 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-4-(methylsulfanyl)benzonitrile (CAS 1002557-03-0)
- 5-Chloro-2-methylbenzothiazole (CAS 1006-99-1)
- 7-Chloro-5-methylthieno[3,2-b]pyridine (CAS 1211582-14-7)
- 4-Chloro-3-methylthieno[3,2-c]pyridine (CAS 1315362-03-8)
- 1-Chloro-n-cyclopropyl-n-methylmethanesulfonamide (CAS 1343803-65-5)
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- 4-Chloro-6-methyl-thieno[2,3-b]pyridine (CAS 1824285-22-4)
- 2-Chloro-6-methylphenyl isothiocyanate (CAS 19241-34-0)
Recommended Standards
- 7-(Chloromethyl)benzo[d]thiazole (CAS 688732-17-4)
- 7-Chloro-3-methylbenzo[d]isothiazole (CAS 75608-05-8)
- 7-(Chloromethyl)benzo[d]isothiazole (CAS 2021538-99-6)
- n-Cyclopentylsulfamoyl chloride (CAS 42065-66-7)
- 4-Cyclopropoxy-3-(methylamino)benzamide (CAS 1243403-57-7)
- 3-(Difluoromethyl)cyclobutanamine (CAS 1785626-63-2)
- (E)-4-Chloro-2-styrylpyrimidine (CAS 1245652-84-9)
- 2-(4-Methyl-6-(pyridin-2-yl)pyrimidin-2-yl)ethan-1-amine hydrochloride (CAS 1196155-36-8)
- Methyl 5-bromo-4-fluoro-2-(hydroxymethyl)benzoate (CAS 2385546-41-6)
- tert-Butyl 3-amino-3-phenylpropanoate (CAS 149193-92-0)
- 2-Chloro-5-cyanopentanoyl chloride (CAS 89466-72-8)
- Parecoxib Impurity 42 (CAS CATO-C4X-159142)
- ethyl 5-amino-1-(2-fluorophenyl)-1H-imidazole-4-carboxylate (CAS 1283340-97-5)
- Tripeptide-10 citrulline (CAS 960531-53-7)
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