proposed order amending schedule 3 to the canadian environmental protection act 1999 9 pages available in english and french substances listed to the export control list ecl are grouped according to the following criteria part 1 includes substances whose use is prohibited in canada. under the authority of the canadian environmental protection act 1999 cepa 1999 these substances can only be exported under very limited circumstances such as for destruction . part 2 includes substances for which notification or consent for export is required pursuant to an international agreement. these substances are subject to the prior informed consent pic procedure of the rotterdam convention which is an international convention promoting shared responsibility and cooperative efforts amongst parties in the international trade of certain hazardous chemicals. part 3 includes substances whose use is restricted in canada. examples of these substances include ozone-depleting substances which may be exported subject to domestic export controls. the proposed order amending schedule 3 to the canadian environmental protection act 1999 hereinafter referred to as the proposed order proposes several additions and modifications to the ecl. the proposed order updates the ecl with new substances and groups of substances recently added to annex iii of the rotterdam convention and also adds new substances to the ecl that have recently been banned or restricted in canada under domestic controls. some of these substances have recently been added to the stockholm convention. the proposed order would add the following five substances to part 1 of the ecl. these substances are prohibited in canada and are therefore proposed for inclusion in part 1 of the ecl chlordecone chemical abstracts service cas registry number see footnote 4 143-50-0 endrin 1 2 3 4 10 10-hexachloro-6 7-epoxy-1 4 4a 5 6 7 8 8a-octahydro-exo-1 4-exo-5 8-dimethanonaphthalene cas 72-20-8 toxaphene cas 8001-35-2 alpha-hch cas 319-84-6 and beta-hch cas 319-85-7 . the proposed order would add the following three groups of substances which have been added to annex iii to the rotterdam convention to part 2 of the ecl dinitro-ortho-cresol dnoc and its salts cas 534-52-1 cas 2980-64-5 cas 5787-96-2 cas 2312-76-7 dustable powder formulations containing a combination of benomyl at or above 7 cas 17804-35-2 carbofuran at or above 10 cas 1563-66-2 and thiram at or above 15 cas 137-26-8 and all tributyltin compounds including 1.tributyltin oxide cas 56-35-9 2.tributyltin fluoride cas 1983-10-4 3.tributyltin methacrylate cas 2155-70-6 4.tributyltin benzoate cas 4342-36-3 5.tributyltin chloride cas 1461-22-9 6.tributyltin linoleate cas 24124-25-2 and 7.tributyltin naphthenate cas 85409-17-2 . the proposed order would add nine substances or groups of substances to part 3 of the ecl. these additions are proposed because there are controls placed on these substances in canada which restrict their use benzidine and benzidine dihydrochloride which have the molecular formulas c12h12n2 and c12h12n22hcl respectively cas 92-87-5 cas 531-85-1 2-methoxyethanol which has the molecular formula c3h8o2 cas 109-86-4 pentachlorobenzene which has the molecular formula c6hcl5 cas 608-93-5 tetrachlorobenzenes which have the molecular formula c6h2cl4 cas 12408-10-5 cas 84713-12-2 cas 634-90-2 cas 634-66-2 cas 95-94-3 perfluorooctane sulfonate pfos and its salts compounds that contain one of the following groups c8f17so2 c8f17so3 or c8f17so2n azinphos-methyl cas 86-50-0 phorate cas 298-02-2 and terbufos cas 13071-79-9 .