Mercury (element) used in teething powders for infants. The mercury-containing organohalide merbromin (sometimes sold as Mercurochrome) is still widely used but has been banned in some countries such as the U.S. Mercury and most of its compounds are extremely toxic and must be handled with care; in cases of spills involving mercury (such as from certain thermometers or fluorescent light bulbs), specific cleaning procedures are used to avoid exposure and contain the spill. Protocols call for physically merging smaller droplets on hard surfaces, combining them into a single larger pool for easier removal with an eyedropper, or for gently pushing the spill
Clothianidin report it was stated that clothianidin should not present a direct acute or chronic risk to freshwater and estuarine/marine fish, or a risk to terrestrial or aquatic vascular and nonvascular plants. It is considered to be toxic to aquatic invertebrates if disposal of wastes according to disposal instructions are not followed. The Pest Management Regulatory Agency of Canada lists it as "very highly toxic" to aquatic invertebrates, but only slightly toxic to fish. In the 2003 EPA report it was stated that although no water monitoring studies had been conducted, due to the extreme mobility and persistence of clothianidin in