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A new method was used to reduce the evaporation of liquids (petroleum and gasoline) by preparing a new compound of the active compounds on the surfaces of liquids, which was synthesized from the reaction of EDTA with TBM in ratios of 1: 4 and the result was diagnosed spectroscopically by means of FTIR spectrum, 1H.NMR spectrum, 13C. NMR, CHN, and DMNR. Which confirmed and proved the proposed formula for the resulting compounds which is (tetrakis (2,6-di-tert-butyl-4-methylphenyl 2,2 ', 2', 2 ") - (ethane-1,2-diylbis (azanetriyl)) tetraacetate. And through the use of the previous compound, the process of reducing the rates of evaporation of light hydrocarbons was successful, and by this, by taking certain concentrations of the above-prepared compound, in determining and reducing the rates of evaporation of volatile hydrocarbons from gasoline and oil during storage and transportation and at different temperatures (20, 37, 50 degrees Celsius) was done determining the optimal concentration by determining the lowest steam saturated pressure of the corresponding concentration, which is (1.5 mg / kg) for the prepared compound versus gasoline and petroleum, and the reduction ratios were estimated (95, 92.5, 91.5%) for gasoline and for oil (87.2, 86.0, 85.6%), respectively for degrees various thermocouple (20, 37, 50 ° C). [ABSTRACT FROM AUTHOR]