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Powder 99% Fluorescent Brightener 351 CBS-X CAS No 38775-22-3
Product Details
Mat no.10010011 Fluorescent Brightener 351 CBS-X CAS No.38775-22-3 Yellow-green Powder purity≥99%
| English synonyms | 4,4'-bis[2-(2-sulfophenyl)ethenyl]biphenyl;ci482200;FluorescentBrightener351;2,2'-(4,4'-BiphenylylenebiChemicalbooksvinylene)bisbenzenesulfonicacid;2,2'-[(4,4'-Biphenylylene)bis(ethene-2,1-diyl)]bisbenzenesulfonicacid; 2,2'-[(4,4'-Biphenylylene)bisvinylene]bis(benzenesulfonic acid) ; (E,E)-4,4 '-bis[2-sulfostyryl]biphenyl ; 2,2'-[1,1'-Biphenyl-4,4'-diylbis(2,1-ethenediyl)]bis(benzenesulfonic acid) |
| CAS No. | 38775-22-3 |
| Molecular formula | C28H22O6S2 |
| Molecular weight | 518.6 |
| EINECS number | 254-121-0 |
| Refractive index | 1.688 |
| density | 1.414 |
| Storage conditions | Sealed in dry, 2-8°C |
| Acidity coefficient (pKa) | -0.92±0.27(Predicted) |
| Application |
Fluorescent brightener CBS-X is the best brightener in detergents. It is white powder, soluble in water, slightly cyan and resistant to bleaching powder. For hair whitening and animal protein fiber, the dosage is about 0.5g/l. Fluorescent whitening agents can be divided into: (1) fluorescent whitening agent CBS-X belongs to stilbene fluorescent whitening agent, which is the most variety and quantity of fluorescent whitening agents. It is mainly used in cotton fiber and some chemical synthetic fiber, papermaking, soap making and other industries, such as fluorescent whitening agents FB, EBF, vbl, etc., with blue chemicalbook fluorescence; (2) Coumarin type: with the basic structure of coumarin ketone, it is used for celluloid and PVC plastics, such as fluorescent whitening agent WS, with strong blue fluorescence; (3) Pyrazoline type: used for wool, polyamide, acrylic and other fibers, such as fluorescent brightener WG, with green fluorescence; (4) Benzoxynitrogen type: used for polyester, nylon and other fibers and PVC, polystyrene and other plastics, such as fluorescent brightener DT, with red fluorescence; (5) Naphthalene phthalimide type: used for polyester, acrylic, nylon and other fibers, such as fluorescent brightener at, with blue fluorescence. |
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