DMSO (Dimethyl Sulfoxide) Content (DMSO), % ≥99.9 Crystallizing Point, ≥18.1degree Acid Value (mgKOH/g) ≤0.03 Transmittance (400nm), % ≥96.0 Refractive Index, 20degree 1.4775 1.1790 Water Content, % ≤0.1 In case you need the material DMSO (Dimethyl Sulfoxide) of other specification, you are welcome to feel free to let us know, and I will try my best to meet with your requirements.