Solubilization effect of surfactants on C. I. Reactive Blue 221

The solubility of C. I. Reactive Blue 221 in water was investigated at 25 ℃ using NaCl,AEO9,AEO3,JFC,AES and L-64 as additive,respectively. The results showed that the solubility of C. I. Reactive Blue 221 was significantly decreased with the addition of NaCl,while addition of each of other surfactants increased the dye solubility. The major-minor order of their solubilization effects is:JFC ≈ L-64 AEO9 AEO3 AES. When AEO9or L-64 was added with a dosage of 80 g / L,the solubility of C. I. Reactive Blue 221 was improved from 100 g / L to 190 g / L. When JFC 15 g / L,L-6420 g / L and AEO95 g / L were contained in the solution of C. I. Reactive Blue 221,its solubility was increased to 200 g / L,and the dye solution remained stable for more than 20 hours.