2,4-Dichloro-5-(methylsulfanyl)benzoic acid CAS 51521-99-4
| CAS No. | 51521-99-4 |
| Molecular Formula | C8H6Cl2O2S |
| Molecular Weight | 237.10 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.
2,4-Dichloro-5-(methylsulfanyl)benzoic acid (CAS 51521-99-4), molecular formula C8H6Cl2O2S and molecular weight 237.10 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2,4-Dichloro-5-(methylsulfanyl)benzoic acid (C8H6Cl2O2S) 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).
CATO manufactures 2,4-Dichloro-5-(methylsulfanyl)benzoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H6Cl2O2S |
| Molecular Weight | 237.10 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Dichloro Standards
- 2,6-Dichloro-4-(methylsulfanyl)benzoic acid (CAS 2145093-98-5)
- 1,2-Dichloro-1,1,2-trifluorooctane (CAS 219904-94-6)
- N-(3,5-Dichloro-4-hydroxyphenyl)thiourea (CAS 1240673-08-8)
- 2,4-Dichloro-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine 6-oxide (CAS 1312935-07-1)
- 1-(4,6-Dichloro-2-(methylthio)pyrimidin-5-yl)ethanone (CAS 1447839-64-6)
- 4,8-Dichloro-6-methylquinoline-3-carbonitrile (CAS 1016759-71-9)
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Recommended Standards
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- 331845-78-4 2-[4-(4-Fluorobenzene-1-sulfonyl)piperazin-1-yl]ethan-1-ol DTXSID60368335 (CAS 331845-78-4)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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