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Application of hydrocarbon azo dyes for the detection of the presence of azo dye in hydrocarbons and azo dyes
Application of hydrocarbon azo dyes for the detection of the presence of azo dye in hydrocarbons and azo dyes
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机译:碳氢偶氮染料在检测碳氢化合物和偶氮染料中偶氮染料存在中的应用
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PCT No. PCT/EP94/04091 Sec. 371 Date Jun. 6, 1996 Sec. 102(e) Date Jun. 6, 1996 PCT Filed Dec. 9, 1994 PCT Pub. No. WO95/17483 PCT Pub. Date Jun. 29, 1995Azo dyes of the formula IMAGE where the ring A may be benzofused, n is 0 or 1, and R1-R8 are as defined, as pH-dependent markers for hydrocarbons, hydrocarbons containing the above-mentioned azo dyes, and a method for detecting these azo dyes in hydrocarbons.
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