DMSO is a colorless liquid derived from lignin, the natural material that bonds together the cells of trees. It is extracted during the manufacturing of pulp and then processed. It is an organic non-synthesized product Dimethyl Sulfoxide (CH3)SO This product is intended for use as a solvent only. May cause skin irritation. Not approved for human use. Keep out of reach of children. The choice of the process used in the various applications is the sole responsibility of the user.