Ammonium Formate

## Ammonium Formate (NH₄HCO₂, CAS 540-69-2): Key Functions and Uses

1. **LC–MS Mobile-Phase Additive**
Ammonium Formate is a volatile ammonium salt widely used as a buffer and mobile-phase modifier in **liquid chromatography–mass spectrometry (LC–MS and LC–MS/MS)**. Its volatility makes it suitable for mass-spectrometric detection without leaving significant nonvolatile residues.

2. **Improved Chromatographic Separation**
In HPLC and LC–MS methods, Ammonium Formate can help control pH, ionic strength, retention behavior, and peak shape. It is commonly evaluated for the analysis of pharmaceuticals, metabolites, peptides, proteins, lipids, and other polar or ionizable compounds.

3. **Proteomics and Metabolomics Research**
CAS 540-69-2 supports analytical workflows in proteomics, metabolomics, lipidomics, drug screening, impurity analysis, and biomolecule characterization. The selected concentration and pH should be optimized for the column, analyte, ionization mode, and mass spectrometer.

4. **Catalytic Hydrogen-Transfer Reagent**
Ammonium Formate can act as a hydrogen donor in transfer-hydrogenation reactions, especially when used with catalysts such as palladium on carbon or Raney nickel. It may support the reduction of selected nitro, imine, alkene, or other reducible functional groups.

5. **Organic Synthesis Reagent**
The compound is used in selected organic reactions as a formate source, ammonia source, or reaction additive. It may participate in N-formylation and related transformations involving amines, depending on the catalyst, solvent, temperature, and reaction design.

6. **Pharmaceutical and Fine-Chemical Manufacturing**
Ammonium Formate is relevant to pharmaceutical synthesis, process chemistry, active-substance research, intermediate preparation, and fine-chemical development. Its usefulness comes from its solubility, volatile nature, and compatibility with selected catalytic and analytical processes.

7. **Buffer and Laboratory Reagent**
Ammonium Formate is used to prepare laboratory buffer solutions and controlled-pH systems. It may also support biochemical research, sample preparation, reaction optimization, and analytical method development where a volatile ammonium-based buffer is preferred.

8. **Quality, Procurement, and Safety Considerations**
When sourcing Ammonium Formate 540-69-2, buyers should verify purity, HPLC or LC–MS grade, water content, residual metals, pH, formic-acid or ammonia impurities, packaging, and certificate of analysis. Useful SEO keywords include **Ammonium Formate, CAS 540-69-2, LC–MS buffer, HPLC mobile-phase additive, volatile ammonium salt, transfer-hydrogenation reagent, pharmaceutical synthesis reagent, proteomics reagent, and metabolomics chemical**. Users should follow the supplier’s Safety Data Sheet and select the appropriate grade for analytical, research, or industrial applications.