https://doi.org/10.1351/goldbook.K03372
Unit for catalytic activity coherent with the SI, equal to the catalytic activity that catalyses a reaction rate of one @M03980@ per second in an @A00470@ system. \(1\ \text{kat} = 1\ \text{mol s}^{-1}\). The katal is recommended for use in the specific context of @E02159@ and clinical chemistry.
Source:
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 977 [Terms] [Paper]
See also:
PAC, 1994, 66, 2587. (Glossary of bioanalytical nomenclature - Part 1: General terminology, body fluids, enzymology, immunology (IUPAC Recommendations 1994)) on page 2595 [Terms] [Paper]