Measurement and Correlation of Solubility of Tetraphenyl Piperazine-1,4-diyldiphosphonate in Mixed Solvents Feng, Y.; Dai, H.; Gao, W.; Huang, Y.; Tang, W.; Zhang, C.; Luo, H.; Yuan, Y.; Chen, L.; Li, Y.; Journal of Chemical & Engineering Data 2015, 60, 561-567