12 mg/kg of body weight, based on a LOAEL of 1.2 mg/kg of body
weight per day for effects on behavioural patterns and serum
biochemistry in a 6-month study in pigs, using an uncertainty factor of
100 for inter- and intraspecies variation (no additional factor for use of
a LOAEL instead of a NOAEL was considered necessary because of
doubts over the biological significance of the observed changes)