Ammonium formate (NH4HCO2)- Crystalline introduce:
Ammonium formate, NH4HCO2, is the ammonium salt of formic acid. It is a colorless, hygroscopic, crystalline solid.
Molar mass: 63.056 g·mol−1
Appearance: White monoclinic crystals, deliquescent
Odor: Slightly ammoniac
Density: 1.26 g/cm3
Melting point: 116 °C (241 °F; 389 K)
Boiling point: 180 °C (356 °F; 453 K)decomposes
Solubility in water:(grams per 100g of water)102g(0 °C);142.7 g (20 °C);202.4 g (40 °C);516 g (80 °C)
Solubility in other solvents: Soluble in liquid ammonia, alcohol, diethyl ether
Ammonium formate is widely used in various organic reactions like Leuckart reaction which involves the reductive amination of aldehydes and ketones. It serves as a buffer in high performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC/MS). It finds application in palladium on carbon (Pd/C) reduction of functional groups. For example, reduction of alkenes to alkanes and formaldehyde to methanol. It is also used to prepare formic acid insitu as well as used to store formic acid by making it as an ammonium salt.
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