Chemical Property of Calcium arsenate
Chemical Property:
- Vapor Pressure:0Pa at 20℃
- Melting Point:1455℃ [CRC10]
- PSA：172.50000
- Density:3,62 g/cm3
- LogP:-1.71200
- Water Solubility.:It is soluble in water and acids, insoluble in organic solvents
- Hydrogen Bond Donor Count:0
- Hydrogen Bond Acceptor Count:8
- Rotatable Bond Count:0
- Exact Mass:397.69028
- Heavy Atom Count:13
- Complexity:36.8
- Transport DOT Label:Poison
- Purity/Quality:
-
99.9% *data from raw suppliers
CalciumArsenate *data from reagent suppliers
Safty Information:
- Pictogram(s):
- Hazard Codes:
- Statements:
23/25-45-50/53
- Safety Statements:
45-53
- MSDS Files:
-
SDS file from LookChem
Useful:
- Chemical Classes:Metals -> Arsenic Compounds, Inorganic
- Canonical SMILES:[O-][As](=O)([O-])[O-].[O-][As](=O)([O-])[O-].[Ca+2].[Ca+2].[Ca+2]
- Inhalation Risk:A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.
- Effects of Short Term Exposure:The substance is irritating to the eyes and respiratory tract. The substance may cause effects on the gastrointestinal tract. This may result in severe gastroenteritis, loss of fluids and electrolytes, cardiac disorders and shock. Exposure far above the OEL could cause death. The effects may be delayed. Medical observation is indicated.
- Effects of Long Term Exposure:The substance may have effects on the skin, mucous membranes, peripheral nervous system, bone marrow and liver. This may result in pigmentation disorders, hyperkeratosis, perforation of the nasal septum, neuropathy, anaemia and liver impairment. This substance is carcinogenic to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development.
-
Description
The calcium arsenate that is sold commercially today
as an insecticide is not a single chemical compound but
a complex mixture of several calcium arsenates and an
excess of calcium hydroxide. The material is made
from arsenic trioxide by first oxidizing it to arsenic pentoxide
with nitric acid and then reacting the solution of
arsenic pentoxide or arsenic acid with a slurry of
calcium hydroxide. The conditions of temperature,concentration, and duration of reaction are important
because of their influence on the physical nature of the
product.
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Physical properties
Commercial calcium arsenate generally is colored
pink and is alkaline in reaction. It is a finely divided
powder.
-
Uses
Calcium arsenate has been used extensively against certain
insects affecting field crops, especially cotton. It cannot
be used safely on apples, peaches, beans, and some other
crops because of its burning effect on the foliage and
fruit. It is banned by a number of countries. Calcium arsenate is also used in weather- resistant wood treatment. It was used mainly in viticulture, in the past. it was mainly used against the boll weevil in cotton cultivation. Insecticide; molluscicide.
