Kemmie 250ml DMSO Liquid 99.9% Pure - USP Grade Dimethyl Sulfoxide SolventKemmie 250ml DMSO Liquid 99. 9% Pure USP Grade Dimethyl Sulfoxide Solvent 99. 9% Pure pharmaceutical Grade DMSO, also known as Dimethyl Sulfoxide. DMSO, or dimethyl sulfoxide, is derived from Pine trees as a byproduct of the paper manufacturing industry. It is also naturally found in garlic as one of the roots 70+ sulfur compounds. It has long been used as a chemical solvent and chemical intermediate for: Non industrial use, including in pesticides