violet acid
1.With the adjustment of both dyeing temperature and the adding of Na2SO4,the union dyeing effects were achieved between wool and the modified ramie with the dyes of Unisol Red 6GN,Unisol yellow 4GK,Unisol blue 3GS,Lanaset yellow4GN,Lanaset red2B,Lanaset blue5G,Acid Violet 54,Acid Yellow 44,C. I. Acid Blue 142 in optimized one bath and one step dyeing process.
4.A new flow injection catalytic spectrophotometric method has been developed for the determination of oxalic acid based on the catalytic effect of oxalic acid on the oxidation of crystal violet by chromate. The linear range of the determination of oxalic acid is 0 6～40μg/mL . This method has been applied to the determination of oxalic acid in water extracts from some vegetables.
5.Indirect Determination of Total Acid-Soluble Aluminum in Natural Waters by Oscillopolarography Using Pyrocatechol Violet
6.C. I. Acid Violet 17 was synthesized by the condensation of sulfonatedN-ethyl-N-benzylaniline with p-(N,N-diethyl)aminobenzaldehyde in the presence of a catalyst and under acid condition at 95-100℃, then oxidation with 30% hydrogen peroxide at pH=5-6. The yield of the oxidation reaction was 86.5%;
