Optical Brightener BBU (C.I.220)

Structural formula:

Molecular formula: C₄₀H₄₀N₁₂O₁₆S₄Na₄
CAS No. : 16470-24-9
Appearance: Light yellow uniform powder
Max UV absorption wavelength: 348±1nm
Fluorescent intensity: 100±3
Whiteness: ≥-3
Moisture content: ≤5.0%
Content of water-insolubie impurities: ≤0.5%
Fineness(residual content passed through 250μm-pore sieve): ≤10.0
Application: Mainly used for paper making
Package: Fiber drum or PE bags
Recommended dosage: 0.1-0.5% of the dry pulp