Some anomalies have been found in the Hg-TI amalgam viscosity variation with temperature and component concentrations. An intermetallic compound formation or a miscibility gap in the amalgam state diagram are probably responsible for the anomalous behaviour. Viscosity measurements have been carried out through the toroidal oscillating viscosimeter described in Ref. 1, while previous results on Hg-TI viscosity are reported in Refs. 2,3,4. At the present time, the anomalies were mainly observed at 28.2% at. T1, which belongs to a composition interval where the amalgam behaviour is particularly complex; two intermetallic compounds are located at 28.57% and at 33.33% at. TI while their maxima in the state diagram are so flat to be hardly detectable. Anomalous results were obtained well above the solidification temperature and, though they are not evidence for a phase transition to an in-homogeneous liquid state or to an intermetallic compound, such a transition is a likely cause of the anomalous behaviour.