AZO-DYES FROM FORMALDIMETHONE

Abstract

Formaldimethone  has  been  coupled  with  the  diazonium  salts  of  aniline,  o-toluidine,  0- and  p-xylidines,  alpha- and  beta-naphthylamines,  and  p-bromaniline.  The  azo  compounds  dye  silk,  wool  and  leather  in  fast  colours  varying  from  yellow  to  orange.  They  are  fugitive  on  cotton.  Coupling  of  formaldimethone  tetrazonium  salt  of  benzidine  has  yielded  a  dye  which  also  is  fugitive  on  cotton.