We offer optical whitening agent 2b.

Specification of optical whitening agent 2b (c.I.No.24)

Product name: op.Whitening agent 2b
Empirical formula: c40s4n12o16h42
Molecular weight: 1074 g/m
Form supplied: dry powder
Physical appearance: free flowing, bright yellow powder
Solubility in water: 4.0% at 30oc, 5.5% at 60oc
Shade on fabric: bluish
Ph. Condition of application: alkaline
Effective temp.: 20oc to 60o
Substantivity: medium
Stability to hydrogen peroxide excellent
Stability to hydrosulfite of soda: excellent
Stability to water: fair
Treatment with chlorine: fair
Stability of chlorine in the bath: poor
Fastness to washing: excellent
Product whiteness: fair
Suggested uses: cotton, linen, rayon, hosiery, visco, paper & paper coating.


Effective in anionic & nonionic system in alkaline condition, heat stability for is unaffected upto 120c. Therefore suitable for spray drying operation.

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