Industrial Purity Specifications Tetraethylammonium Fluoride Dihydrate
- Critical Purity Metrics: Industrial grades require >98% assay with strict limits on iodide and heavy metal residues.
- Synthesis Control: Optimized anion exchange processes ensure consistent yield and minimize hazardous by-products.
- Procurement Standards: Reliable supply chains provide comprehensive COA documentation and scalable bulk pricing.
Tetraethylammonium fluoride dihydrate (CAS: 665-46-3) is a critical reagent in organic synthesis, particularly serving as a source of naked fluoride ions for nucleophilic substitution reactions. In industrial applications, the consistency of the industrial purity directly impacts reaction yields and downstream processing efficiency. As a premier global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. adheres to rigorous quality control standards to ensure that every batch meets the demanding specifications required for pharmaceutical intermediates and fine chemical production.
The chemical structure, defined by the molecular formula C8H24FNO2 and a molecular weight of 185.28, includes two waters of hydration. This dihydrate form is essential for stability under ambient conditions, yet it introduces specific analytical challenges regarding moisture content and stoichiometry. Buyers evaluating suppliers must look beyond simple assay percentages and examine the full spectrum of impurity profiles, including residual halides and heavy metals.
Key Purity Metrics: HPLC vs. Ion Chromatography
Accurate characterization of Tetraethylammonium fluoride dihydrate requires orthogonal analytical methods. While High-Performance Liquid Chromatography (HPLC) is standard for organic impurities, Ion Chromatography (IC) is often superior for quantifying the fluoride anion and detecting residual halides such as iodide or chloride, which are common by-products of the synthesis route.
In a robust manufacturing process, the goal is to minimize residual iodide to below 0.1%. High levels of residual iodide can poison catalysts in subsequent coupling reactions or lead to unwanted side products. Furthermore, moisture content must be tightly controlled. Although the product is a dihydrate, excess free water can interfere with anhydrous reaction conditions if not accounted for in the stoichiometry.
| Parameter | Industrial Specification | Test Method |
|---|---|---|
| Assay (Purity) | >98.0% | Titration / HPLC |
| Residual Iodide | <0.1% | Ion Chromatography |
| Heavy Metals (as Pb) | <10 ppm | ICP-MS |
| Moisture Content | 18.0% - 20.0% | Karl Fischer |
| Appearance | White to Off-White Crystalline Powder | Visual |
Acceptable Limits for Moisture, Residue, and Heavy Metals
The presence of heavy metals is a critical safety and quality parameter, especially for intermediates destined for pharmaceutical applications. Regulatory frameworks often dictate strict limits, typically below 10 ppm for lead, arsenic, and mercury. Sourcing from a qualified supplier ensures that raw materials used in the manufacturing process are screened prior to reaction.
Regarding moisture, the dihydrate structure implies a theoretical water content of approximately 19.4%. Deviations from this range indicate either efflorescence (loss of water) or the presence of free surface moisture. Both scenarios can alter the effective molarity of the fluoride ion in solution. Therefore, the COA (Certificate of Analysis) must explicitly state the results of Karl Fischer titration to confirm the hydration state matches the labeled specification.
Interpreting COA for High-Purity Batches
A comprehensive COA is the cornerstone of B2B chemical procurement. It should not only list the final assay but also provide data on specific impurities identified during quality control. When reviewing documentation, procurement managers should verify the following:
- Batch Consistency: Compare multiple COAs to ensure the synthesis route yields consistent results over time.
- Safety Data: Ensure GHS classification matches internal safety protocols (typically GHS07 Warning for this compound).
- Packaging Integrity: Confirmation that the product was sealed under inert atmosphere to prevent degradation.
For facilities requiring large volumes for continuous processing, understanding the bulk price structure is vital. Pricing often correlates with purity grades; however, economies of scale significantly reduce the cost per kilogram for tonnage orders compared to laboratory-scale packaging.
Commercial Viability and Supply Chain Stability
Reliable access to high-quality fluoride sources is essential for maintaining production schedules. Disruptions in the supply chain can lead to costly downtime. NINGBO INNO PHARMCHEM CO.,LTD. maintains robust inventory levels and streamlined logistics to support international demand. When sourcing high-purity TEAF, buyers should prioritize manufacturers who can provide custom packaging solutions, such as double-lined bags or drum packaging, to ensure stability during transit.
The chemical is also known by the synonym N,N,N-Triethylethanaminiumfluoriddihydrat, reflecting its systematic nomenclature. Regardless of the naming convention used in procurement documents, the CAS number 665-46-3 remains the definitive identifier. Ensuring this number matches across all invoices and safety documentation prevents regulatory delays at customs.
Safety and Handling Considerations
While less hazardous than anhydrous fluoride sources, Tetraethylammonium fluoride dihydrate still requires careful handling. Safety statements typically indicate precautions against skin irritation and respiratory sensitization (H319, H335). Storage under inert atmosphere at room temperature is recommended to maintain the integrity of the dihydrate form and prevent absorption of atmospheric carbon dioxide, which can lead to carbonate formation.
In conclusion, securing a supply of Tetraethylammonium Fluoride Dihydrate requires a partner who understands both the chemical nuances and the commercial pressures of industrial synthesis. By focusing on verified purity metrics, transparent COA data, and scalable manufacturing capabilities, procurement teams can mitigate risk and optimize their production workflows.