4-Chlorobenzothiazole CAS 3048-45-1
| CAS No. | 3048-45-1 |
| Molecular Formula | C7H4ClNS |
| Molecular Weight | 169.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chlorobenzothiazole (CAS 3048-45-1), molecular formula C7H4ClNS and molecular weight 169.63 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Chlorobenzothiazole (C7H4ClNS) contains a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 169.63 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 4-Chlorobenzothiazole 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 | C7H4ClNS |
| Molecular Weight | 169.63 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorobenzothiazole Standards
- 5-Chlorobenzothiazole (CAS 2786-51-8)
- 2-Chlorobenzothiazole (CAS 615-20-3)
- 2-Chlorobenzothiazole-6-carbonitrile (CAS 80945-83-1)
- 2-Chlorobenzothiazole-6-carboxylic Acid (CAS 3855-95-6)
- Methyl 2-Chlorobenzothiazole-6-carboxylate (CAS 90792-69-1)
- Ethyl 2-Chlorobenzothiazole-5-carboxylate (CAS 1680191-38-1)
- Ethyl 2-Chlorobenzothiazole-6-carboxylate (CAS 78485-37-7)
- 5-Chlorobenzothiazole-2-sulphonyl fluoride (CAS 934236-36-9)
Recommended Standards
- 4-Chlorobenzo[d]isothiazole (CAS 25380-61-4)
- 4-Chlorothieno[2,3-c]pyridine (CAS 477874-92-3)
- 3-Methylazetidine-1-sulfonyl chloride (CAS 2107184-15-4)
- 5-Chloro-2-sulfanylbenzonitrile (CAS 38244-31-4)
- 3-Acetyl-n,n-dimethylbenzene-1-sulfonamide (CAS 173158-15-1)
- endoD-Tyr(Et)2a-Atosiban (CAS CATO-C4X-229377)
- N-Methyl-N-(1-(pyrazin-2-yl)ethyl)piperidin-3-amine hydrochloride (CAS 1289385-34-7)
- 2-(pyrrolidin-3-yl)-5-(trifluoromethyl)pyridine dihydrochloride (CAS 1909318-71-3)
- 3-(Methoxycarbonyl)-1-(propan-2-yl)-1h-pyrazole-5-carboxylic acid (CAS 617709-78-1)
- methyl 5-amino-1,2,3-thiadiazole-4-carboxylate (CAS 89033-41-0)
- 2-Ethoxy-3-(1-isobutylpyrrolidin-2-yl)pyridine (CAS 1352537-70-2)
- 2,6-Difluoro-N-propylbenzamide (CAS 1343286-93-0)
- 3-[(thietan-3-yl)amino]propanenitrile (CAS 1865559-62-1)
- Semaglutide impurity 195 (CAS CATO-C4X-2226195)
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