proposed order adding toxic substances to schedule 1 to the canadian environmental protection act 1999 10 pages available in english and french canadians depend on chemical substances that are used in hundreds of goods from medicines to computers fabrics and fuels. unfortunately some chemical substances can negatively affect our health and environment when released in a certain quantity or concentration in the environment. scientific assessments of the impact of human and environmental exposure have determined that a number of these substances constitute or may constitute a danger to human health or to the environment as per the criteria set out under section 64 of the canadian environmental protection act 1999 cepa 1999 . the objective of the proposed order adding toxic substances to schedule 1 to the canadian environmental protection act 1999 hereinafter referred to as the proposed order made under subsection 90 1 of cepa 1999 is to add the following substances to the list of toxic substances in schedule 1 of cepa 1999 methanone bis4- dimethylamino phenyl- chemical abstracts service cas registry no. 90-94-8 hereafter referred to as michlers ketone michlers ketone is a substance not occurring naturally in the environment. it is found primarily as a residual in paper colorants remaining from the manufacturing process of some dyes and pigments. it may also be present in textiles and used in inks in pens. michlers ketone may also be used in industrial processes such as a component in dry film products and in electronics manufacturing. 2-butanone oxime cas no. 96-29-7 hereafter referred to as butanone oxime butanone oxime is an industrial chemical widely used as an anti-skinning agent in the formulation of alkyd paints primers varnishes adhesives and stains for both industrial and consumer use. the substance is also used in canada as a corrosion inhibitor in industrial boilers and water treatment systems used in the manufacturing process of urethane polymers as a wood preservative and in antifouling marine paints. butanone oxime may also be present in some consumer products and in a number of pesticide products as well as in some adhesives silicone sealants and printing inks. oxirane butoxymethyl- cas no. 2426-08-6 hereafter referred to as n-butyl glycidyl ether. the substance n-butyl glycidyl ether is a chemical not reported to occur naturally. in canada n-butyl glycidyl ether is used principally as a reactive diluent in epoxy resin formulations which have applications in coatings adhesives binders sealants fillers and resins. this addition would enable the development of instruments which may be regulatory and or non-regulatory under cepa 1999 to manage the risks posed by these substances.