This product is not tested for solubility. However, information available for other Doxorubicin HCl products will apply.
D1515, Doxorubicin HCl, is soluble in water and pure DMSO at 50 mg/ml.
Solutions are sensitive to light and will degrade over long-term exposure.
https://www.sigmaaldrich.com/product/sigma/d1515
D5225, Doxorubicin, Ready-Made solution is a 2mg/ml solution in pure DMSO.
The product is stored at 20°C and is assigned a retest schedule of every 2 years.
https://www.sigmaaldrich.com/product/sigma/d5220
Solutions appear to be reasonably stable when protected from light.
See the link below to review a publication regarding the solution stability of Doxorubicin HCl.:
https://pubmed.ncbi.nlm.nih.gov/517541/