Old Holland Cadmium Yellow Medium
36RCW#1.0.5, opaque. PY:35
(ASTM rates colors from cadmium green
light to cadmium yellow-orange as PY35)
Schmincke Mussini Cadmium Yellow Middle is 36RCW#2.0.5, opaque. Cadmium was an early replacement for yellow lead colors.
Natural Pigments, Rublev brand has encapsulated white and light yellow lead paint with silicon so they are now a safe colors to use in combination with other elements. They are both poisonous, all oil yellows and cobalt driers brown more than oil.
Real Color Wheel main page.