Copper(II) arsenate
Encyclopedia
Copper arsenate also called copper orthoarsenate or tricopper arsenate or tricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous ammonium
and dilute acids. Its CAS number is or .
used in agriculture. It is also used as a herbicide
, fungicide
, and a rodenticide. It is also used as a poison in slug
baits.
Copper arsenate can also be a misnomer for copper arsenite, especially when meant as a pigment
.
. It is used as an insecticide, fungicide, and miticide
. Its use is banned in Thailand since 2001.http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm
Ammonium
The ammonium cation is a positively charged polyatomic cation with the chemical formula NH. It is formed by the protonation of ammonia...
and dilute acids. Its CAS number is or .
Uses
Copper arsenate is an insecticideInsecticide
An insecticide is a pesticide used against insects. They include ovicides and larvicides used against the eggs and larvae of insects respectively. Insecticides are used in agriculture, medicine, industry and the household. The use of insecticides is believed to be one of the major factors behind...
used in agriculture. It is also used as a herbicide
Herbicide
Herbicides, also commonly known as weedkillers, are pesticides used to kill unwanted plants. Selective herbicides kill specific targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often synthetic "imitations" of plant...
, fungicide
Fungicide
Fungicides are chemical compounds or biological organisms used to kill or inhibit fungi or fungal spores. Fungi can cause serious damage in agriculture, resulting in critical losses of yield, quality and profit. Fungicides are used both in agriculture and to fight fungal infections in animals...
, and a rodenticide. It is also used as a poison in slug
Slug
Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...
baits.
Copper arsenate can also be a misnomer for copper arsenite, especially when meant as a pigment
Pigment
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.Many materials selectively absorb...
.
Natural occurrences
Anhydrous copper arsenate, Cu3(AsO4)2, is found in nature as the mineral lammerite. Copper arsenate tetrahydrate, Cu3(AsO4)2.4H2O, occurs naturally as the mineral rollandite.Related compounds
Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number . It is found naturally as the mineral oliveniteOlivenite
Olivenite is a copper arsenate mineral, formula Cu2AsO4OH. It crystallizes in the monoclinic system , and is sometimes found in small brilliant crystals of simple prismatic habit terminated by domal faces...
. It is used as an insecticide, fungicide, and miticide
Miticide
Acaricides are pesticides that kill members of the Acari group, which includes ticks and mites.Acaricides are used both in medicine and agriculture, although the desired selective toxicity differs between the two fields.-Terminology:...
. Its use is banned in Thailand since 2001.http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm
See also
- Lead arsenate
- Calcium arsenateCalcium arsenateCalcium arsenate is an extremely poisonous chemical compound that most commonly exists as a colorless to white amorphous solid. It was originally used as a pesticide and as a germicide...
- Paris GreenParis GreenParis Green is an inorganic compound more precisely known as copper acetoarsenite. It is a highly toxic emerald-green crystalline powder that has been used as a rodenticide and insecticide, and also as a pigment, despite its toxicity. It is also used as a blue colorant for fireworks...
(copper arsenate-acetate) - Chromated copper arsenateChromated copper arsenateChromated copper arsenate is a wood preservative used for timber treatment since the mid-1930s. It is a mix of chromium, copper and arsenic formulated as oxides or salts. It preserves the wood from decay fungi, wood attacking insects, including termites, and marine borers...
- Scheele's GreenScheele's GreenScheele's Green, also called Schloss Green, is chemically a cupric hydrogen arsenite , CuHAsO3. It is a compound similar to Paris Green...
(copper arsenite)