| 摘要 |
PURPOSE: A colorless petroleum marker dyes is provided which develops a color on contact with a developing reagent is provided. CONSTITUTION: The colorless petroleum marker dye composition comprises a liquid petroleum product and a compound having the formula I, wherein R is C1-C18 alkyl, C1-C18 alkenyl, aryl or aralkyl; R, R and R are independently hydrogen, C1-C12 alkyl, chloro or bromo; and R is hydrogen, chloro or bromo; and wherein said compound is present in an amount that is not detectable visually. In the composition, the compound represented by the formula I is contained in an amount from 0.5 ppm to 100 ppm.
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