TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The salts comprise the metal cations of transition metals of groups 8-10 of the periodic table, preferably copper or iron cation (preferred), and anions of formate, oxalate (both preferred), phosphinate, phosphonate, dithionate, sulfite, dithionite, thiosulfate or boron hydride. The salt is iron oxalate or iron formate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the mixing step, the component (ii) is premixed with the thermoplastic polymer, which is heated to the temperature above the reaction temperature of the component (ii) and subsequently the premixed component is mixed with the other components of the thermoplastic molding compounds. Preferred Components: The polyols include glycerol, trimethylolpropane, 2,3-di-(2'-hydroxyethyl)-cyclohexan-1-ol, hexane-1,2,6-triol, 1,1,1-tris-(hydroxymethyl)ethane, 3-(2'-hydroxyethoxy)-propane-1,2-diol, 3-(2'-hydroxypropoxy)-propane-1,2-diol, 2-(2'-hydroxyethoxy)-hexane-1,2-diol, 6-(2'-hydroxypropoxy)-hexane-1,2-diol, 1,1,1-tris-((2'-hydroxyethoxy)-methyl)ethane, 1,1,1-tris-2'-hydroxypropoxy-methyl-propane, 1,1,1-tris-(4'-hydroxyphenyl)-ethane, 1,1,1-tris (hydroxyphenyl)-propane, 1,1,3-tris-(dihydroxy-3-methylphenyl)-propane, 1,1,4-tris-(dihydroxyphenyl)-butane, 1,1,5-tris-(hydroxyphenyl)-3-methyl pentane, di-trimethylolpropane, ethoxylate and propoxylate of trimethylolpropane, or D-mannitol, D-sorbitol, dulcitol, arabitol, inositol, xylitol, talitol, allitol, altritol, adonitol, erythritol, threitol, pentaerythritol, dipentaerythritol and tripentaerythritol, and/or the polyols consist of monosaccharides, preferably mannose, glucose, galactose, fructose, D-xylose, arabinose, D-idose, D-erythrose, D-threose, D-ribose, D-lyxose, D-allose, D-altrose, D-gulose, D-talose, D-ribulose, D-erythrulose, D-xylulose, D-psicose, D-sorbose, D-tagatose, D-gluconic acid, D-glucose acid, D-mannosaccharic acid, mucic acid, D-glucuronic acid, D-manno acid, ascorbic acid, D-glucosamine, D-galactosamine, or oligomeric and/or polymeric saccharide, preferably cyclodextrins, sucrose, milk sugar, lactose, sucrose, trehalose, raffinose, maltose, starch (amylose, amylopectin), pectins, chitin, glycogen, inulin, hemicellulose or cellulose and/or oligomeric or polymeric polyols does not consist of group of saccharides. The polyol further includes tripentaerythritol (preferred), pentaerythritol, dipentaerythritol, ditrimethylolpropane and ethylene-vinyl alcohol copolymers. The mixture of substances includes iron formate and dipentaerythritol and/or tripentaerythritol. The component (ii) includes metal formate and/or metal-oxalate, preferably iron oxalate or iron formate (preferred). The component (iii) includes polyols whose molecular structure comprises more than three hydroxyl groups, preferably dipentaerythritol and/or tripentaerythritol (preferred). The component (iii) further includes polyester polyols, polyether polyols, phenol-formaldehyde resins, polyvinyl alcohol, ethylene vinyl alcohol copolymers or terpolymers from ethylene, vinyl alcohol and other compound having at least one double bond, preferably more than one double bond. The component (i) includes aliphatic or semi-aromatic polyamide, preferably polyamide (PA) prepared from one or more monomers epsilon -caprolactam, adipic acid, terephthalic acid, hexamethylenediamine, tetramethylenediamine, or 2-methylpentane-1,5-diamine, where the polyamide is PA6, PA66 or co-polyamide of PA6 or PA66. EXAMPLE - No suitable example given.