Methyl 5-(chlorosulfonyl)-2-iodo-3-methylbenzoate CAS 1154155-39-1
| CAS No. | 1154155-39-1 |
| Molecular Formula | C9H8ClIO4S |
| Molecular Weight | 374.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 5-(chlorosulfonyl)-2-iodo-3-methylbenzoate (CAS 1154155-39-1), molecular formula C9H8ClIO4S and molecular weight 374.58 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/iodine substitution, an aromatic ring system, Methyl 5-(chlorosulfonyl)-2-iodo-3-methylbenzoate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 374.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Methyl 5-(chlorosulfonyl)-2-iodo-3-methylbenzoate 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 | C9H8ClIO4S |
| Molecular Weight | 374.58 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl/I-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Ethyl 5-(chlorosulfonyl)-2-iodobenzoate (CAS 1155911-38-8)
- 2,4-bis(chlorosulfonyl)phenyl pivalate (CAS CATO-C4X-212340)
- Methyl 3-(chlorosulfonyl)-4-phenyl-5-(trifluoromethyl)thiophene-2-carboxylate (CAS 306935-98-8)
- Methyl 6-(chlorosulfonyl)-4-iodopicolinate (CAS 1393531-11-7)
- Methyl 4-(chlorosulfonyl)-6-iodopicolinate (CAS 1393548-05-4)
- methyl 5-(chlorosulfonyl)-2-iodobenzoate (CAS 1065102-81-9)
- 5-(Chlorosulfonyl)-2-iodo-3-methylbenzoic acid (CAS 1099186-84-1)
- Methyl 3-(chlorosulfonyl)-5-iodobenzoate (CAS 1155083-86-5)
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