This is a product of the United States Pharmacopeia. Solubility testing has not been performed. However, the research product A6848 is tested for solubility at 50 mg/ml in a 1:1 mixture of dimethylformamide and methanol. Another research grade item, PZ0038, is tested for solubility at 2 mg/mL in DMSO. The solubility in water has not been determined.
Please see the link below to review the datasheet for the research grade material, A6848:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/320/622/a6848pis.pdf