... medicine, movie producer, tanning, dressing, metallurgy, fiber, rubber industry, also used as detergent, flame retardant, used as ... processing, smelting, metal heat treatment, fiber, rubber and agricultural seed soaking, etc. At the same time is also used ... food, medicine, film, tanning, dressing, metallurgy, fiber, rubber industry, etc, also can use detergent, fire extinguishing agent. Introduction: ...