USA DMSO 99.9 % undiluted Dimethyl sulfoxide liquid Pharmaceutical grade Odourless DMSO with A Medical applicator in 3.4 oz - 100ml Amber glass bottle. The Purity and assured effectiveness of USA DMSO are preserved by ensuring it only comes in contact with glass. Maintaining its pharmaceutical grade and its integrity by only using glass containers, ensuring proper storage and following the strict safety guidelines during the manufacturing process to offer a superior product. The substance has a freezing point of 65.3F (18.4 C) it can be stored in a solid or liquid / crystal state, this does not alter its quality. If it arrives in a crystallized state do to A change in temperatures it can be simply liquefied by placing the sealed bottle in warm water for several hours. It is important to keep the bottle neck dry and securely closed to maintain optimal product quality. Due to DMSO having solvent properties , it is not suitable for use with many types of plastic containers, which could compromise purity.