4-[(5-Chloro-2-benzoxazolyl)thio]-2-butyn-1-ol CAS 669715-35-9
| CAS No. | 669715-35-9 |
| Molecular Formula | C11H8ClNO2S |
| Molecular Weight | 253.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-[(5-Chloro-2-benzoxazolyl)thio]-2-butyn-1-ol (CAS 669715-35-9), molecular formula C11H8ClNO2S and molecular weight 253.70 g/mol, is a CATO reference standard with documented purity and traceability.
4-[(5-Chloro-2-benzoxazolyl)thio]-2-butyn-1-ol (C11H8ClNO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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), 4-[(5-Chloro-2-benzoxazolyl)thio]-2-butyn-1-ol 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 | C11H8ClNO2S |
| Molecular Weight | 253.70 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
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- 1-Chloro-4-(2-thioxobenzo[d]oxazol-3(2H)-yl)but-3-en-2-one (CAS 88235-13-6)
- 2-Chloro-5-(phenylsulfonyl)pyridine (CAS 877868-60-5)
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Recommended Standards
- 4-(4-Chlorophenyl)-2-methylthiazole-5-carboxylic acid (CAS 537712-89-3)
- 4-[4-(chloromethyl)-1,3-thiazol-2-yl]benzoic acid (CAS 842137-56-8)
- 4-(3-Chlorophenyl)-2-methylthiazole-5-carboxylic acid (CAS 905808-17-5)
- 5-(4-Chlorophenyl)-2-methyl-1,3-thiazole-4-carboxylic acid (CAS 475106-47-9)
- 3-(2-(2-Oxo-5-phenylfuran-3(2H)-ylidene)hydrazinyl)benzoic acid (CAS 62160-60-5)
- 1-(7-Amino-3,3-dimethylindolin-1-yl)ethanone (CAS 1187967-62-9)
- potassium trifluoro(3-(hydroxymethyl)phenyl)borate (CAS 1015082-77-5)
- Cholic Acid Impurity 31 (CAS CATO-C4X-116031)
- 4-(4-(2-Hydroxyethyl)-3-methyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzoic acid (CAS 861210-30-2)
- 1-(2-Methoxyacetyl)pyrrolidine-3-carboxylic acid (CAS 1411059-60-3)
- 4-Nitroisoxazol-5(2H)-one compound with pyridine (1:1) (CAS 145640-15-9)
- 1-(1-(Difluoroboryl)oxy-3H-benzo[f]chromen-2-yl)-ethanone inner complex (CAS 119634-42-3)
- 2-(3,4-Dichlorophenyl)-2-methylpent-4-enoic acid (CAS 619254-64-7)
- Semaglutide Impurity 140 (CAS CATO-C4X-2226140)
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