Pharma Grade DMSO (Dimethyl Sulfoxide) is a very distinctive dipolar highly aprotic organic solvent with a freezing point of 64 Deg F.If your DMSO arrives with crystals or has solidified, it can be turned back into a liquid by allowing it to thaw out above this temp, however it will take some time. DMSO by itself is actually odorless, what makes Dimethyl Sulfoxide smell and taste like onions or garlic is DMS (Dimethyl Sulfide). Industrial grades of DMSO will contain DMS and therefore give off an offensive odor. Pure Pharma Grade Dimethyl Sulfoxide is distilled and purified to remove DMS and any other contaminants leaving it odorless. One of the highest concerns surrounding DMSO is that it can take everything through the skin. While DMSO by itself can penetrate fairly easily through the skin and does enhance the adsorption rates of some chemical compounds, it does not have a universal ability to take just anything through the barrier properties of human skin. Despite the past history, Dimethyl Sulfoxide is proven to be a safe versatile material. It should also be understood that when water is present as a cosolvent in DMSO the penetration kinetics are much lower. Exposure to DMSO - Skin contact, the most likely exposure has been extensively studied with humans and animals with large dosages over extended period of times showing only minor effects such as skin irritation, itching and a burning sensation. There have been no long term detrimental effects observed from exposure to DMSO. We certify this Plastic container is manufactured using BPA free plastic under FDA regulation 21 CFR 177.1520 in an AS9100 and ISO9001