Optical Brightener Swn
Chemical name: 7-diethylamino-4-methylcoumarin, 7-(Diethylamino)-4-methyl-2H-1-benzopyran-2-one, Methyl-7-(diethylamino)coumarin, Coumarin 1, MDAC
Molecular formula: C14H17NO2
Molecular weight: 231.3
CAS No.: 91-44-1
C. I: 140
The same name: Uvitex SWN; SWR (Uvitex); FBO (Blankophor); VPA (Rylux); LS (Delft Weiss); WNS(Blancol); WN(Kayaphor). Optical Brightener SWN, Fluorescent Whitening Agent SWN, Fluorescent Brightener SWN, C. I. 140, Optical Brightening Agent SWN, UVITEX SWN, SWR(Uvitex)
Fluorescent Whitening Agent SWN is soluble in ethanol, acidic liquor, resin and varnish. In water, the solubility of SWN is only 0.006 percent. It functions by emitting red light and present purple tincture.
Appearance: White crystal powder
Solubility: Dissolve in acid water, ethanol and other organic solvent
Melting Point: 72-74° C
Assay: 99% min (HPLC)
Volatile Content: 0.3%max
Ash Content: 0.1%max
It is used in brightening acetate fiber, polyester fiber, polyamide fiber, acetic acid fiber and wool. It also can be used in cotton, plastic and chromatically press paint, and added into resin to whiten the fiber cellulose
Package: Packing in 25kg fiber drum or according to the requirement of the customers.