4 GALLON SPECIAL BPA FREE PLASTIC JUG OF 99.995% DMSO (Dimethyl Sulfoxide). If you have any problem with your order please let us know immediately so we can take care of any issue you may have. 99.995% PURE PHARMA GRADE DMSO (Dimethyl Sulfoxide) THE HIGHEST GRADE AVAILABLE! Inferior Industrial grades will have a sulfur like smell, the cause is from impuritieses such as DMS (Dimethyl Sulfide). Our DMSO is purified and has this offensive chemical and any impurities removed during the manufacturing process. Our DMSO and all its components are made in America and not of Chinese origin. When DMSO IS PACKAGED IN CERTAIN PLASTIC CONTAINERS it will absorb the hazardous plasticizer (BPA) contained in the plastic and is not considered safe!!! Please be advised that DMSO will freeze at 64 deg, if your bottle arrives frozen, simply place the bottle in warm water and let thaw out this is completely normal and will not effect the DMSO.