What is Copper HDO?
What is Copper HDO?
Cu-HDO is an outdoor wood preservative composed of copper (Cu) and N-cyclohexyl-diazeniumdioxide (HDO). Cu-HDO is used for pressure-treatment of lumber, poles, millwork, and piles. Cu-HDO is not likely to move through soils and contaminate groundwater.
Is chromated copper arsenate still used?
It has been used for timber treatment since the mid-1930s, and is marketed under many trade names. In 2003, the United States Environmental Protection Agency and the lumber industry agreed to discontinue the use of CCA-treated wood in most residential construction.
Is azole Copper Safe?
Copper Azole and Alkaline copper quaternary contain fungicide and copper but not arsenic. The copper-based preservatives are considered safer as virtually all the preservatives used are also used in other home uses such as growing food crops and in swimming pools.
Is pressure-treated wood bad for vegetable gardens?
Pressure-treated wood is safe for vegetable garden beds but with some precautions. The crops should be grown 10 inches away from CCA treated woods to prevent leaching of the chemicals into the plants. Heavy impermeable plastics can also be used to act as a barrier between the crops and the wood.
Is pentachlorophenol harmful to humans?
It was primarily used as a wood preservative. Pentachlorophenol is extremely toxic to humans from acute (short-term) ingestion and inhalation exposure. Acute inhalation exposures in humans have resulted in neurological, blood, and liver effects, and eye irritation.
Is copper azole safe for vegetable gardens?
Manufacturers of pressure-treated wood with micronized copper quaternary claim that their lumber won’t leach any copper into the soil and therefore, it’s safe for all uses, including making garden beds. Copper Azole and Alkaline copper quaternary contain fungicide and copper but not arsenic.
What is cu-HDO made of?
Bis-(N-cyclohexyldiazeniumdioxy)-copper (Cu-HDO) Cu-HDO is an outdoor wood preservative composed of copper (Cu)and N-cyclohexyl-diazeniumdioxide (HDO). Cu-HDO is used for pressure-treatment of lumber, poles, millwork, and piles. Cu-HDO is not likely to move through soils and contaminate groundwater.
What is cu HDO wood preservative?
Cu-HDO is an outdoor wood preservative composed of copper (Cu)and N-cyclohexyl-diazeniumdioxide (HDO). Cu-HDO is used for pressure-treatment of lumber, poles, millwork, and piles.
Does Copper migrate from azole treated wood to soil?
One 2014 study found that copper did migrate from copper azole treated wood into the soil immediately adjacent to the planter sides. Copper levels were not higher in roots or tubers of radishes, carrots or potatoes compared to beds constructed from untreated wood.
Is copper in treated wood harmful to children?
Another 2014 study found that exposure to copper that was released from the surface of CA treated wood could result in an acute toxic exposure for children less than 8 years old IF the child ingested most of the copper residue on her/his hands and feet; the copper would not be toxic dermally.
