Optical brightener VBL (C.I.85)

Introduction: VBL is a stilbene triazin tetra-sulfonic sodium class optical brightener suitable paper and textile industries.

Details:CAS: 1224-16-7

Molecular Formula：C₃₆H₃₄N₁₂Na₂O₈S₂

Molecular Weight：872.84

Appearance: Light yellow uniform powder

Properties： 
VBL as an anionic type Brightener can be soluble in soft water and resistance to acid at pH 6-11. It can’t be resistant to Cu²⁺ and Fe²⁺ , it is stable to rongalite but can’t be baked under high temperature. it can be used along with anionic surfactant or nonionic surfactant in one bath, and it can’t be used with cationic dyestuff and surfactant.
Applications： 
it is widely used in paper making and pulp or coating industries. Is suitable for polyvinyl alcoholic fiber and polyamide fiber. It can also be used in cotton and gluing products, has good affinity with cellulose fiber.

Packing: 25Kg complex paper bag or carton