Dispersant NNO is an anionic surfactant, the chemical name is naphthalene sulfonate formaldehyde condensation, yellow brown powder, soluble in water, resisting acid and alkali, hard water and inorganic salts, with excellent dispersant and protection of colloidal properties, no permeability and foaming, have affinity for proteins and polyamide fibers, no affinity for fibers such as cotton and linen.