FIELD: chemistry.
SUBSTANCE: inorganic additive for labelling substances which is labelled with stable heavy isotopes is filler material and/or a pigment. The label is firmly embedded into the additive and one or more isotopes are selected from a group comprising 2H, 13C, 15N, 18O and/or 34S. In order to obtain the inorganic additive, the label is embedded into the chemical compound of the additive via chemical treatment.
EFFECT: invention enables to identify labelled products.
17 cl, 3 ex
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