Iron oxide yellow (α-FeOOH). It is a kind of basic oxide and relatively stable. The color spectrum is pure ochre yellow. It has a range of spectrum from lemon to orange, with nice pigment properties. The tinting Strength is almost close to lead chromate yellow and covering power shall not be greater than 15g/㎡. With Poor thermal stability, if heat to 150-200℃ and begin to dehydration, When the temperature rises to 270-300℃, and it will turns to iron oxide red if dehydrated rapidly.