Table 4.24. Inventory of biocides used in Denmark, Danish Environmental Protection Agency

Inventory of biocides used in Denmark

Table 4.24
Main biocides in imported leather and leather products ¹⁾

Chemical name (active agent)	Trivial name	CAS No	% active agent in biocidal products
Most common:
carbamodithioic acid, dimethyl-, potassium salt	Potassium dimethyl-dithiocarbamate	128-03-0	?
carbamodithioic acid, dimethyl-, sodium salt	Sodium dimethyl-dithiocarbamate	128-04-1	?
thiocyanic acid, methylene ester	Methylene bis(thiocyanate)	6317-18-6	?
thiocyanic acid, (2-benzothiazolylthio)methyl ester	TCMTB	21564-17-0	?
Less common:
K-N-hydroxymethyl-N-methyldithiocarbonat			?
2(3H)-benzothiazolethione, sodium salt	Na-2-mercapto-benzothiazole	2492-26-4	?
carbamic acid, [1-(butylamino)carbnyl)-1H- benzimidiazol-2-yl]-, methyl este	Benomyl	17804-35-2	?
benzene, 1-[(diiodomethyl)sulfonyl]-4-methyl-		20018-09-1	?
3(2H)-isothiazolone, 2-octyl-	Octhilinone	26530-20-1	?

1) Import of products containing >5 ppm pentachlorphenol is prohibited. Surveys of pentachlorophenol in Germany, Switzerland and Austria (with similar regulation of PCP in finished products as in Denmark) demonstrate that PCP can be found at levels above 5 ppm in a few percent of imported leather and leather products; mainly imported from Asia (UBA 1997; OFEFP 1998 among others). PCP cannot be considered one of the main preservatives in leather and is not mentioned by Frendrup 2000.