Fluorescent Whitening Agent 351 C. I. 351
Chemical name: 4.4-bis(2-disulfonic acid styryl) biphenyl
Molecular formula: C28H18O6S2Na2
Molecular weight: 562
CAS No.: 27322-41-8
C. I.: 351
SYNONYMS: Fluorescent Whitening Agent 351, Optical Brightener, Fluorescent Brightener 351, Optical Brightening Agent, Brightener CBSC, Whitening Agent CBCS, CAS: 27322-41-8, CBCXS, C. I. 351

Properties:
It features high whitening strength, excellent fastness, to chlorine/oxygen bleaching, washing, and dry/wet light fastness, level dyeing properties. It is liable to biology degradation. Even in low temperature, the product has a high solubility in water, especially suitable for liquid detergent.
Specifications:
Appearance: Light yellow green and good flowing granular.
Indissoluble substance (in water): 0.5% max
Solubility (in water): 25C, 25g/l; 70C, 100g/l; 95C, 300g/l
Moisture: 5%max
Particle size: 95% through 80mesh sieves
E1: 1150+/_38
In ultra-violet range: 348-350nm

Application:
Fluorescent Whitening Agent 351 is widely used in detergent, soap and cosmetics industries etc It can dissolved in an ingredient and blended equably at all stages of processing. It is also can be used in increasing whiteness of cellulose fiber, PA, azelon, cotton. The effects of being brightened cotton by this consistency product are 2.7 times as big as Fluorescent Whitening Agentof diphenyle-thene double triazine.
Package: Packing in 25kg fiber drum or according to the requirement of the customers.
Storage: Keep in cool dry place; Keep away from sunlight, provided the usual precautions for handling chemicals are observed. Avoid dust formation and ignition sources.