DMSO PT 99% EA 99% Pure Liquid Horse Solvent is pure dimethyl sulfoxide liquid. This pyrogen-free, acetone-free DMSO solvent is sold for use as a mild solvent only. DMSO for horses may be used at any stage of life. This DMSO liquid offers a 99.7% pure organic formula for trusted use. Manufactured in the U.S.A, the DMSO treatment ensures quality.