Optical Brightener CBS-X(CAS#27344-41-8) is soluble in water, anionic type, maximum spectrum absorption at 348-350nm, it’s the best brightener in detergent industry and soap industry.It’s can be added at any step during producing process. It can be used as brightener for detergent, cotton, linen, silk, polyamide fiber, wool and paper. It can be added to any process of any type of detergent.