Industrial Purity Specifications for Ethyl 4,4-Difluoro-3-Oxobutanoate (CAS 352-24-9)
- Critical Specs: Boiling point 162 °C, Density 1.61 g/cm³, and typical purity ≥98% for pharmaceutical applications.
- Quality Assurance: Verification via GC, HPLC, and NMR ensures compliance with strict Certificate of Analysis (COA) standards.
- Global Supply: Bulk procurement available in 25kg to 1-ton scales with optimized logistics for fine chemical intermediates.
In the realm of fine chemical synthesis and pharmaceutical manufacturing, the consistency of fluorinated intermediates dictates the success of downstream reactions. Ethyl 4,4-difluoro-3-oxobutanoate, frequently referenced by its CAS number 352-24-9, serves as a critical building block for numerous therapeutic agents. As a leading global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. emphasizes that understanding the technical specifications and purity grades of this compound is essential for procurement managers and process chemists alike.
The molecular formula C6H8F2O3 and molecular weight of 166.12 define the stoichiometric baseline, but industrial viability relies on stringent control over impurities. This article details the standard industrial purity grades, analytical verification methods, and the impact of material quality on overall synthesis route efficiency.
Standard Industrial Purity Grades and Physical Properties
Procurement specifications for ethyl 4,4-difluoro-3-oxobutanoate vary based on the intended application, ranging from laboratory research to large-scale production. However, for pharmaceutical intermediate use, a minimum purity of 98% is the industry benchmark. Lower grades, sometimes found at 90%, may contain excessive water or residual starting materials that compromise reaction yields.
The following table outlines the critical physical and chemical properties expected in a high-grade commercial supply:
| Parameter | Standard Specification | Test Method |
|---|---|---|
| CAS Number | 352-24-9 | Verification |
| Purity (GC Area %) | ≥ 98.0% | Gas Chromatography |
| Boiling Point | 162 °C | Distillation |
| Density | 1.61 g/cm³ | Pychnometer |
| Refractive Index | 1.407 | Refractometry |
| Water Content | ≤ 0.5% | Karl Fischer |
| Flash Point | 68 °C | Pensky-Martens |
Maintaining these specifications requires advanced distillation and purification techniques. Variations in density or refractive index often signal the presence of isomers or incomplete fluorination, which can be detrimental during subsequent coupling reactions. Buyers seeking bulk price advantages must ensure that cost reductions do not come at the expense of these critical physical constants.
Analytical Methods for Verifying COA Compliance
Reliable sourcing depends on rigorous validation of the Certificate of Analysis (COA). For 4,4-Difluoro-3-oxobutyric Acid Ethyl Ester, single-method verification is insufficient. A multi-technique approach ensures that the material meets the required industrial purity standards.
Gas Chromatography (GC)
GC is the primary method for assessing overall purity. It separates volatile components, allowing chemists to quantify the main peak against known impurities. A high-quality batch should show a single dominant peak with minimal shoulder peaks indicating degradation products or unreacted precursors.
Nuclear Magnetic Resonance (NMR)
1H and 19F NMR spectroscopy provides structural confirmation. The difluoro methylene group exhibits distinct coupling patterns. Any deviation in the chemical shift or integration ratios suggests structural anomalies that GC might miss, such as regioisomers.
High-Performance Liquid Chromatography (HPLC)
While GC is standard for volatile esters, HPLC is useful for detecting non-volatile residues or specific polar impurities. Combining these methods provides a comprehensive profile required for regulatory compliance in pharmaceutical manufacturing.
Impact of Impurities on Downstream Pharmaceutical Synthesis
The quality of Ethyl 4,4-difluoro-3-oxobutyrate directly influences the efficiency of downstream processes. Common impurities include water, residual acids, and mono-fluorinated analogs. Water content above 0.5% can hydrolyze the ester group during storage or react violently with strong bases used in subsequent alkylation steps.
Furthermore, residual acidic impurities can neutralize catalysts, leading to stalled reactions and reduced yields. In complex multi-step syntheses, carrying over impurities from early stages often necessitates additional purification steps later, increasing overall production costs and time. Therefore, investing in high-purity material initially is often more cost-effective than managing downstream failures.
Procurement and Bulk Supply Considerations
For industrial-scale operations, supply chain stability is as crucial as chemical specifications. Manufacturers must offer consistent batch-to-bquality and reliable logistics. Packaging typically ranges from 1kg samples for R&D to 25kg drums or 200L containers for production runs. Storage conditions are vital; the material should be kept in a dark place, sealed in dry conditions at room temperature to prevent hydrolysis and degradation.
When evaluating suppliers for Ethyl 4,4-Difluoroacetoacetate, procurement managers should prioritize vendors who provide full traceability and technical support. NINGBO INNO PHARMCHEM CO.,LTD. stands as a premier partner in this sector, offering robust supply capabilities and technical expertise to ensure your synthesis projects remain on schedule.
By adhering to strict purity specifications and utilizing comprehensive analytical verification, pharmaceutical companies can mitigate risk and optimize production efficiency. Ensure your next procurement cycle prioritizes verified quality data and reliable manufacturing partners to maintain the integrity of your final drug products.