加拿大環境部長潘迪思（Jim Prentice）以及衛生部長阿盧卡克（Leona Aglukkaq）1月30日宣布在這二種化學物質中發現毒性反應，他們發表最後結論同時也針對加拿大化學品管理計畫（Canada's Chemicals Management Plan）的第二組化學成分制訂初步的危機管理辦法。
The Canadian government today declared two chemicals used in lipstick and other personal care products to be toxic to the environment, although officials said they are not used in large enough quantities to be of concern for human health. Two other chemicals used in cosmetics were found to be harmful to human health.
Canada's declaration is the first environmental or health-based determination concerning these chemicals issued by any country.
The two personal care chemicals of concern for the environment are the siloxanes D4 and D5. Used as emollients to soften the skin, siloxanes are found in most personal care products on the market in Canada and the United States.
The siloxanes are also used in textiles, paints and coatings, antiperspirants, sealants, lubricants, plastics, non-medical ingredients in pharmaceuticals, silicone polymers, food additives, surface treatments for wounds, and medical devices.
While not believed to be harmful to health, because these chemicals enter the environment in large quantities, persist in the environment, bioaccumulate up the food chain and may harm fish and aquatic organisms, Canada is proposing to set concentration limits for them.
This will minimize the amount of D4 and D5 in personal care products that is released to municipal wastewater streams when they are washed off. The government also proposes to regulate the amounts of D4 and D5 that are released to the environment manufacturing process wastewater.
Two other substances used in cosmetics were found to be of concern for human health - isoprene and epichlorohydrin - both considered to be human carcinogens.
They will be added to the Cosmetic Ingredient Hotlist to prevent their future use in cosmetics. For isoprene, Health Canada is proposing that manufacturers use best-available technology to control releases.
Environment Minister Jim Prentice and Health Minister Leona Aglukkaq announced the findings of toxicity today as they released final conclusions and initial risk management approaches for Batch 2 substances in Canada's Chemicals Management Plan