Dissolves readily at 5 mg/ml in 0,05 M sodium/potassium phosphate pH 7,0 giving a clear green solution.

One unit decomposes one µmole of hydrogen peroxide per minute at 25 °C, pH 7,0.

Catalase is used for the removal of peroxides, the generation of oxygen.

Unit definition: One unit will produce a delta A800 of 0,001 per minute at pH 7,5 and 25 °C, using a suspension of brewers yeast as a substrate in a 3 ml reaction mixture.