FLUORESCENT LABEL FOR PETROLEUM PRODUCTS Russian patent published in 2000 - IPC

FIELD: petroleum processing and petrochemical processes. SUBSTANCE: invention provides composition including petroleum product and label, amount of which has to be found. Composition is distinguished by that label is compound selected from group of compounds having formulas I and II: , , wherein R₁ is C₁-C₁₈-alkyl or aryl; R₂,R₃,R₄ and R₅ are hydrogen, chlorine, bromine, or C₁-C₁₂-alkyl; and R₆ hydrogen, chlorine, or bromine; label acquiring color and fluorescence when in contact with developing reactive, which converts label into dianion. EFFECT: achieved searched properties of label: invisibility in liquid hydrocarbons and color effects in presence of corresponding reactive. 32 cl, 21 ex