FIELD: identification of commercial products. SUBSTANCE: invention relates to compounds used for hidden marking of substances, materials, and articles that can be applied when performing various-type expertises at commercial and industrial enterprises. For that aim, C16-C26-n- alkanes, individually or as mixtures, are introduced directly into substances to be marked (chemicals, diesel fuel, kerosene, paraffins, Vaselines, anticorrosive compositions, cosmetic and therapeutic preparations, etc.) or chemical marker-containing compositions are prepared and put on product packaging or are introduced into adhesive formulations or other constituents of products. EFFECT: increased efficiency of marking and identification. 2 dwg, 4 ex
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