- WARNING: This product is sold as a solvent only. It is unlawful to represent in any way that this product is useful or safe for medicinal purposes. 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. Keep out of reach of children. READ AND FOLLOW PRODUCT LABEL INSTRUCTIONS & INFORMATION. WARNING, MAY BE UNSAFE. NOT APPROVED FOR HUMAN USE.