Fluorescent Brightener 4BK

Main Chemical Composition: Stilbene bistriazine derivative Specification: C.I. NO. 86 Appearance: Slight yellow powder Fluorescent Color: Slight bluish Water: < 5% Fineness( 120 mesh residue): ≤5% Property: 1) With strong fluorescence, excellent whitening performance and slight bluish shade 2) With high light stability and chemical stability. 3) Good acid stability, stable in perborate and hydrogen peroxide. Application: Mainly be used in whitening of cotton fabric and polyester /cotton blends. T/C whitening in one bath. Treating Process: Exhaust process: 0.1-0.8% (o.w.f.), bath ratio: 1:10-30 Temperature 90--100℃ × 30-40min →wash→dry. The processing can be adjusted according to the actual situation. One bath process of Scouring hydrogen peroxide bleaching and whitening: Dosage: 0.2—0.8%( o.w.f.) hydrogen peroxide:5-15/L Stabilizer:1—5g/L NaOH: 2—4g/L Scouring agent: 0.5—1g/L bath ratio: 1:10-30 Temperature 90--100℃ × 30-40min →wash→dry. The processing can be adjusted according to the actual situation. Packing: 25kg per fiber drum
used for COTTON

CAS NO:27344-41-8

EC NO:248-421-0

Molecular Formula:C₂₈H₂₀Na₂O₆S₂

Molecular Weight:562.5643

Synonyms:;2,2'-((1,1'-biphenyl)-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonicaci;2,2'-([1,1'-biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonicacidi;2,2'-(4,4'-biphenylylenedivinylene)di-benzenesulfonicacidisodiumsalt;Benzenesulfonicacid,2,2'-[(1,1'-biphenyl)-4,4'-diyldi-2,1-ethenediyl]bis-,disodiumsalt;disodium4,4'-bis(2-sulfostyryl)biphenyl;tinopalcbs;fluorescent brightener cbs-x;disodium 2,2'-[biphenyl-4,4'-diyldi(E)ethene-2,1-diyl]dibenzenesulfonate;disodium 2,2'-[biphenyl-4,4'-diyldi(Z)ethene-2,1-diyl]dibenzenesulfonate;4,4'-Bis-(2-sulfostyryl)-biphenyl disodium salt;Optical Brightening Agent CBS-X;Optical Brightner CBS-X;Fluorescent brightener DBH;Fluorescent brightener 4BK;

Molecular Structure: