This is a product of the United States Pharmacopeia. The material is Sorafenib Related Compound H. This compound is not tested for solubility, however, other sources indicate it is slightly soluble in DMSO and Methanol.
Regarding the solubility of Sorafenib, as listed for product SRP072, this compound is soluble in DMSO at 200 mg/mL and in Ethanol at 3 mg/mL.