Methanesulfonic acid 4-chlorosulfonyl-phenyl ester CAS 77154-19-9
| CAS No. | 77154-19-9 |
| Molecular Formula | C7H7ClO5S2 |
| Molecular Weight | 270.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Methanesulfonic acid 4-chlorosulfonyl-phenyl ester (CAS 77154-19-9), molecular formula C7H7ClO5S2 and molecular weight 270.71 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Methanesulfonic acid 4-chlorosulfonyl-phenyl ester (C7H7ClO5S2) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
As a certified reference material (CRM), Methanesulfonic acid 4-chlorosulfonyl-phenyl ester 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 | C7H7ClO5S2 |
| Molecular Weight | 270.71 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
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- 11-(Piperidin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[b]quinoline (CAS 5782-97-8)
- 4-(2-Methylpropoxy)benzene-1,2-diamine (CAS 86723-18-4)
- 3-Heptyl-7-methoxy-2-methylquinolin-4(1H)-one (CAS 354155-51-4)
- 5-Chloroquinoline-7-carbonitrile (CAS 1256463-65-6)
- 2-(Pyrazine-2-carboxamido)-N-(4-(trifluoromethoxy)phenyl)oxazole-4-carboxamide (CAS 1396793-35-3)
- (2S,3R)-3-(((Benzyloxy)carbonyl)amino)-2-hydroxy-4-phenylbutanoic acid (CAS 59969-65-2)
- Acetyl Hexapeptide-39 (CAS 1382088-38-1)
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