Description Application Phosphorous acid (H3PO3, orthophosphorous acid) may be used as one of the reaction components for the synthesis of the following: • α-aminomethylphosphonic acids via Mannich-Type Multicomponent Reaction • 1-aminoalkanephosphonic acids via amidoalkylation followed by hydrolysis • N-protected α-aminophosphonic acids (phospho-isosteres of natural amino acids) via amidoalkylation reaction Packaging 100, 500 g in poly bottle 2, 4×2 kg in poly bottle