. . "Examples of organic solvents are aliphatic (non-polar) hydrocarbons such as pentane, hexane, heptane, octane, decane and the like; alicyclic hydrocarbons such as cyclopentane and cyclohexane; aromatic hydrocarbons such as benzene, toluene, xylene and the like; halogenated (polar) hydrocarbons such as methylene chloride, ethyl chloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,2-dichloroethylene," . .