What is the difference between a formulation chemist and a toll blender?

A formulation chemist designs and optimizes the recipe—selecting surfactants, solvents, and stabilizers and proving stability. A toll blender manufactures the formula at volume but may not develop it. Many founders need both. AJ Cosmo Labs lets you browse formulators and co-packers separately or find partners who offer both, filtering by MOQ so you only see options that match your batch size.