... CAS No.: 10124-56-8 2.Usage: water softening agent in solution for printing, floating agent etc. Sodium Hexa Meta ... max. (6) Iron, as Fe: 0.05% max. Usage: Used in industries of oil fields, paper production, textile, dyeing, petroleum, chemistry ... metallurgy and construction materials etc. As a water softening agent in solution for printing, floating agent, dispersing medium and high temperature ...