It appears the manufacturer did not list the pigment(s) for this paint.
In general, Mr. Doak's paints do not have pigment info, so we are unable to say for sure what the composition may be. It is reasonable to guess that this may be genuine lead paint, in which case it would be very toxic. We are unable to point out all of the toxicity of artist paints, however genuine lead (sometimes sold as flake white or flemish white) is an obviously serious one that can be pointed out.