Product name:

7-Diethylamino-4-methylcoumarin（fluorescent whitening agent SWN）

CAS NO.

91-44-1

Molecular formula

C14H17NO2

Molecular weight

231.3

Properties

Rice white crystal

Item

Specification

purity

99

Melting point

71-74℃

volatile matter

≤0.5%

ash

<0.05%

ionic

nonionic

Main ingredients

Coumarin derivatives

Dyed color

Neutral color

Others

This product is mainly used for the whitening of wool, feathers and silk, but also can be used in the whitening and brightening treatment of acetate fabric.Having good wet fastness characteristics;It is suitable for finishing and continuous processing.

This product also has a liquid form product, product name:AW-LThe whitening feature is equivalent to the Leucophor WS ofClariant, which is very superior in water solubility; Acid resistant, hard water, and no alkali. Stabilize the reducer.

usage way

Exhaust dyeing process：Texbrite SWN 0.05-0.15% o.w.f 90℃×10-60minutes     Fluorescence whitening agent SWN is soluble in ethanol and glycol, acid aqueous solution, resin, varnish and some organic solvents, whereas in water solubility is only 0.006%. Commercialized products usually need to associate it with sulfuric acid or hydrochloric acid into or after salt and organic acid (such as tartaric acid, citric acid, oxalic acid), or to join and dissolved substances to improve solubility of dispersant type, made of a solution. Therefore, it is necessary to use this product before it is fully dissolved.