Abstract
Syntheses of vat dyes composed of Algol Brilliant Green BK and its substitution of ethoxy and n-propoxy groups for the methoxy group have been made. Their colors and the fastness of the dyes towards sunlight werec ompared. The vattability as well as the dyeing ability were decreased with an increase of numbers of carbon atoms in alkoxy group.Tests on dyeing of cotton and wool from the soluble sulfonic acid esters of these dyes indicated that the hypsochromic effect was slightly decreased with an increase of numbers of carbon atom of the alkoxy group but the difference was less in cotton and more in wool.There was practically no difference in fastness of the dyes against the sunlight by the difference of alkoxy group.
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