（Physical and Chemical Property）
Technical grade（98%）is a orange crystalline solid; melting point:48.5-49℃;vapor pressure:19.7mPa（25℃）,the solubility（27℃）is: in water＜1mg/l;in acetone:400g/t, in xylene:580g/l，(k/ow)11800(PH7,25℃);the 95% trifluralin's melting point is ＞42℃,stale when the temperature is below 52℃（high temperature reservoir test）；hydrolyze when PH3.6 and 9(52℃);decompose under the ultraviolet light, in soil is（DT/53）57-126d.