For NMP, it is used as a solvent for electrolytes in aluminum capacitors for lithium ion batteries and also as a solvent to solubilize polyvinylidene flouride for lithium polymer batteries. Typically EG and Ultra 2 grades of NMP are used for this market/application. It is used because of its high flashpoint, high solvency and low toxicity, it is water soluble with high electrical conductivity.