Dispersogen® PL 26 is a new green dispersant for inorganic pigment, it is compliance with current main regulation requirement. Dispersogen® PL 26 has excellent viscosity decrease efficiency and color development performance for inorganic pigment and extender thanks to the unique molecular weight design, acid/ether ratio control, introduction of modified group and neutralization degree, it can be used as waterborne coating high performance dispersant, and especially suitable for iron oxide inorganic colorant preparation.