Optical brightener BBU

CAS NO.: 16470-24-9

C.I. NO.: 220

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Optical brightener BBU


CAS NO.: 16470-24-9

Molecular Formula: C40H40N12O16S4NA4

C.I. NO.: 220


Appearance: Light yellow fine powder or granule

Fluorescent intensity: 100±3 ( equal to standard sample)

Max. UV absorption wavelength: 350nm.

Performance characteristics:

Bluish tone; solubility in cold water: 200g/L; Solubility in boiling water: 300g/L;

Common affinity to cellulosic fiber;

Stable to oxide, hypochlorite, reducing bleach;

Resistance to alkali, hard water, but medium in acid.


Whitening of cotton, viscose, it has good compatibility with resin finishing agent;

Whitening of surface sizing, coating of paper sheets, paper;

Whitening discharging printing.

Recommended dosage:

Paper-making ( absolute dry pulp): 0.01-0.4%;

Surface sizing with starch, CMC, PVA: 0.1-3g/L.

Coating with PVA, CMC, starch: 0.03-0.4% (compared to weight of coating);

Textile: 0.1-0.5%.

Package: fiber drum or PE bag (N.W. 20 or 25kg)