A 2028 (OTTO) Ammonium acetate, for Molecular biology, 98% Cas 631-61-8 - used with acetic acid to create a buffer solution. A 2028 (OTTO) Ammonium acetate, for Molecular biology, 98% Cas 631-61-8 - used in chromatographic analysis of various compounds such as oligos, proteins, and peptides. It is also employed with acetic acid to provide a buffer solution. Generally it behaves as a catalyst in many reactions like Knoevenagel, Borch. It is also employed as a nutrient additive.