2-(Methylthio)benzo[d]oxazole-7-sulfonyl chloride CAS 1806516-91-5
| CAS No. | 1806516-91-5 |
| Molecular Formula | C8H6ClNO3S2 |
| Molecular Weight | 263.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2-(Methylthio)benzo[d]oxazole-7-sulfonyl chloride.
2-(Methylthio)benzo[d]oxazole-7-sulfonyl chloride (CAS 1806516-91-5), molecular formula C8H6ClNO3S2 and molecular weight 263.72 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 2-(Methylthio)benzo[d]oxazole-7-sulfonyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 263.72 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 2-(Methylthio)benzo[d]oxazole-7-sulfonyl chloride 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 | C8H6ClNO3S2 |
| Molecular Weight | 263.72 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; 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.) | 1995 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Methylthio Standards
- 2-(Methylthio)benzo[d]oxazole-5-sulfonyl chloride (CAS 1803795-45-0)
- 4-(Methylthio)-1-phenyl-4-(pyrrolidin-1-yl)butan-1-one (CAS 59921-85-6)
- 3-Methyl-4-(methylthio)phenylboronic acid, pinacol ester (CAS 2121514-43-8)
- 2-(Methylthio)-7-(trifluoromethyl)-5,6,7,8-tetrahydroquinazolin-5-ol (CAS 1420793-58-3)
- 1-(4-Methyl-6-(methylthio)-2-(thiophen-2-yl)pyrimidin-5-yl)ethanone (CAS 189152-42-9)
- (2-(Methylthio)-5-(phenylthio)pyrimidin-4-yl)methanol (CAS 61727-18-2)
- 2-(2-(Methylthio)phenyl)-5-(prop-2-yn-1-ylthio)-1,3,4-oxadiazole (CAS 339015-34-8)
- 3-(Methylthio)-6-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine (CAS 66523-33-9)
Recommended Standards
- 2-chloro-7-[(1S)-1-methoxyethyl]pyrazolo[1,5-a]pyrimidine-6-carboxylic acid (CAS 1832580-83-2)
- 7-Chloro-1-methyl-3-(3-oxobutyl)quinolin-2(1H)-one (CAS 1784901-27-4)
- 3-(4-Chlorophenyl)-4-(1H-pyrrol-1-yl)butanoic acid (CAS 187870-25-3)
- 2-((4-Chlorophenyl)thio)-6-fluorobenzonitrile (CAS 175204-12-3)
- 1-Cyclohexanecarbonyl-1,4-diazepane (CAS 815651-06-0)
- 3,4-Dihydroxy-5-(trifluoromethyl)benzaldehyde (CAS 116314-64-8)
- 13,14-Dihydro-15-ketoprostaglandina2 (CAS 74872-89-2)
- (2S,4S)-1-(tert-butoxycarbonyl)-4-(difluoromethyl)pyrrolidine-2-carboxylic acid (CAS 474417-79-3)
- 3,5-diisopropylthiophen-2-amine;hydrochloride (CAS 2567557-47-3)
- 3-Amino-4-phenylbutan-1-ol (CAS 62247-37-4)
- 6-Ethoxy-2-(ethylthio)pyrimidin-4(1H)-one (CAS 61636-11-1)
- Sitagliptin Impurity 117 (CAS 871035-61-9)
- N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-3-phenyl-9H-fluoren-2-amine (CAS 2124224-75-3)
- Tirzepatide Impurity 10 (CAS CATO-C4X-324010)
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