4,4-Dichloro-3-(dichloromethyl)crotonic acid methyl ester CAS 97055-33-9
| CAS No. | 97055-33-9 |
| Molecular Formula | C6H6Cl4O2 |
| Molecular Weight | 251.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4-Dichloro-3-(dichloromethyl)crotonic acid methyl ester (CAS 97055-33-9) is a high-purity analytical reference standard with the molecular formula C6H6Cl4O2 and a molecular weight of 251.92 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 4,4-Dichloro-3-(dichloromethyl)crotonic acid methyl ester is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 251.92 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), 4,4-Dichloro-3-(dichloromethyl)crotonic acid methyl 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 | C6H6Cl4O2 |
| Molecular Weight | 251.92 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 | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
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