As mentioned on the Product Detail Page, this product is soluble in DMSO and ethanol. Genistein is also soluble in chlorform:methanol (1:1 (v:v), 10 mg/ml). The molecular weight of Genistein is 270.24 mol/L.
According to DRUGBANK Online https://go.drugbank.com/drugs/DB01645
logP = 3.04 (ALOGPS)
logP = 3.08 (Chemaxon)
pKA (acidic) = 6.55
pKa (basic) = -5.3
The maximum absorbance is determined on the lot specific Certificate of Analysis, please see the link below for a sample Certificate of Analysis: https://www.sigmaaldrich.com/certificates/COFA/G6/G6649/G6649-BULK________WXBD2501V_.pdf