Borate preservatives
Boric acid, oxides and salts (borates) are effective wood preservatives and are supplied under numerous brand names throughout the world. Borate treated wood is of low toxicity to humans, and does not contain copper or other heavy metals. However, unlike most other preservatives, borate compounds do not become fixed in the wood and can readily be leached out. Therefore they should not be used where they will be exposed to rain, water or ground contact. Borate preservatives
. However, treated wood may present certain hazards in some circumstances such as during combustion or where loose wood dust particles or other fine toxic residues are generated or where treated wood comes into direct contact with food and agriculture Alkaline copper quaternary (ACQ) is a preservative made of copper, a fungicide, and a quaternary ammonium compound (quat), an insecticide which also augments the fungicidal treatment is a wood preservative that has come into wide use in the USA
Since it contains high levels of copper, ACQ-treated timber is five times more corrosive to common steel Other copper compounds
These include copper HDO (CuHDO), copper chromate, copper citrate, acid copper chromate, and ammoniacal copper zinc arsenate micronized preservatives use nano particles of copper oxide, for which there are alleged safety concerns
Boric acid is roach poison alklines will eat your skin ammonia is poison cromate is a heavy metal causes brain dammage zinc can be poisonin small quanitys cream for dentures