1,3-dimethyl 2-(chloromethylidene)propanedioate CAS 38238-77-6
| CAS No. | 38238-77-6 |
| Molecular Formula | C6H7ClO4 |
| Molecular Weight | 178.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 178.57 g/mol gives 1,3-dimethyl 2-(chloromethylidene)propanedioate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1,3-dimethyl 2-(chloromethylidene)propanedioate (CAS 38238-77-6) is a high-purity analytical reference standard with the molecular formula C6H7ClO4 and a molecular weight of 178.57 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 1,3-dimethyl 2-(chloromethylidene)propanedioate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 178.57 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.
CATO manufactures 1,3-dimethyl 2-(chloromethylidene)propanedioate 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 | C6H7ClO4 |
| Molecular Weight | 178.57 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1967 |
| Halogen Content | Cl-containing |
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