This DMSO Liquid 99% is available in two convenient sizes. Use as an antioxidant, solvent, as a diminisher of allergic reactions as well as many more applications. This product is available in 16 ounce or one gallon sizes for your convenience. DMSO Liquid 99% is generally used as a solvent. It can be used as a topical application to reduce acute swelling due to trauma. DMSO has been regarded as a valuable pain and swelling reducer. This substance can also act as antioxidant. May crystallize below 70F, crystallization does not affect efficacy after thawing occurs.