The organic solvent component analysis (analysis of unknowns) and the formula developed by product classification can be divided into: composition (1) common organic solvents analysis and formulation development, include: hydrocarbons, halogenated hydrocarbons, alcohols, ketones, esters , phenols and the like. (2) industry analysis and formulation development component of the solvent used, including: the day that water, scouring oil, thinner, turpentine, nitrocellulose lacquer, thinner, white oil.