The influence of surfactants and solvents on the stability constant value of some azo dyes formation between oximes and the diazotized Sulphanilic acid salt

Abstract

The paper deals with studying the effects of the experimental factors on the values of stability constants (K) of the dyes formed by the reactions of aromatic aldoximes as 2-hydroxybenakloxime, 2,4-dihydroxy benzaldoxime and 2-hydroxy-l-naphthaldoxime with diazotized sulfanilic acid salt. Experimentally, two physic; parameters have been founded to be effective on the value of K as the presence of three surface active reagents [cetylIrimethyl ammonium bromide (CTAB), sodium dodecyl sulphate (SDS), starch] and a four polar solvents (water, inethanol, ethanol, n-propanol). Generally, the stability constant alue of any dye formation is determined by knowing the structure of aldoxime, the dielectric constant of the me J mm, the type of surfactant and pl-1 under study.

Keywords

• azo dyes
• oximes
• sulphanilic acid