4-(5-chloro-1,3-benzothiazol-2-yl)phenol CAS 2727-25-5
| CAS No. | 2727-25-5 |
| Molecular Formula | C13H8ClNOS |
| Molecular Weight | 261.73 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-(5-chloro-1,3-benzothiazol-2-yl)phenol (CAS 2727-25-5) is a high-purity analytical reference standard with the molecular formula C13H8ClNOS and a molecular weight of 261.73 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, 4-(5-chloro-1,3-benzothiazol-2-yl)phenol is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 261.73 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C13H8ClNOS |
| Molecular Weight | 261.73 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2-(P-tolyl)-2,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 1031605-70-5)
- 2-(Methylthio)-4-nitrobenzo[d]thiazole (CAS 3621-97-4)
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- 2-(Difluoromethyl)-3-fluoro-6-methoxypyridine-4-carbonyl chloride (CAS 1805176-06-0)
- Semaglutide Impurity 138 (CAS CATO-C4X-2226138)
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