Since the minute is not an SI base unit of time, the enzyme unit is discouraged in favor of the katal, the unit recommended by the General Conference on Weights and Measures in 1978 and officially adopted in 1999.
Pošto minut nije SI jedinica, preporučuje se da se umesto enzimske jedinice koristi katal, jedinica koju je preporučila Generalna konferencija za tegove i mere 1978. i koja je zvanično prihvaćena 1999.