CALCIUM ARSENATE
- CAS No.
- 7778-44-1
- Chemical Name:
- CALCIUM ARSENATE
- Synonyms
- kalo;fencal;kilmag;pencal;spracal;chip-cal;spra-cal;turf-cal;Security;ai3-24838
- CBNumber:
- CB5671562
- Molecular Formula:
- AsH3O4.3/2Ca
- Molecular Weight:
- 398.07
- MOL File:
- 7778-44-1.mol
- Modify Date:
- 2024/3/14 15:18:27
| Melting point | 1455℃ [CRC10] |
|---|---|
| Density | 3,62 g/cm3 |
| vapor pressure | 0Pa at 20℃ |
| RTECS | CG0830000 |
| solubility | soluble in dilute acid solutions |
| form | Powder |
| color | White |
| Specific Gravity | 3.62 |
| Water Solubility | It is soluble in water and acids, insoluble in organic solvents |
| Solubility Product Constant (Ksp) | pKsp: 18.17 |
| Exposure limits |
ACGIH: TWA 0.01 mg/m3 NIOSH: IDLH 5 mg/m3; Ceiling 0.002 mg/m3 |
| CAS DataBase Reference | 7778-44-1(CAS DataBase Reference) |
| EPA Substance Registry System | Calcium arsenate (7778-44-1) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |    GHS06,GHS08,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Hazard statements | H301-H331-H350-H400-H410 | |||||||||
| Precautionary statements | P201-P261-P280-P301+P310a-P405-P501a | |||||||||
| Risk Statements | 23/25-45-50/53 | |||||||||
| Safety Statements | 45-53 | |||||||||
| RIDADR | 1573 | |||||||||
| OEL | Ceiling: 0.002 mg/m3 [15-minute] | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | 6.1 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 28429090 | |||||||||
| Toxicity | LD50 orally in female rats: 298 mg/kg (Gaines) | |||||||||
| IDLA | 5 mg As/m3 | |||||||||
| NFPA 704 |
|
CALCIUM ARSENATE price More Price(2)
CALCIUM ARSENATE Chemical Properties,Uses,Production
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.
Chemical Properties
White powder. Slightly soluble in water; soluble in dilute acids. Decomposes on heating.
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.
Preparation
An old method involving electrolysis in solution for the manufacture of calcium arsenate is as follows. A solution of arsenious oxide in caustic soda (As2O3:NaOH=198:250) is electrolyzed between iron electrodes. Hydrogen and a small quantity of metallic arsenic are liberated at the cathode and very little oxygen at the anode, the basic arsenite in solution being oxidized to arsenate. When this oxidation is complete, any arsenic is filtered off and the solution treated with milk of lime. A basic arsenate of extremely low solubility is precipitated and after removal, is washed and dried.
General Description
White powder. Slightly soluble in water. Toxic by inhalation and ingestion. Used as an insecticide and germicide.
Air & Water Reactions
Slightly soluble in water.
Reactivity Profile
Has only weak oxidizing power but redox reactions can still occur. Soluble in dilute acids. [Hawley]. Produces toxic fumes of arsenic when heated to decomposition .
Hazard
Toxic by ingestion and inhalation.
Health Hazard
CALCIUM ARSENATE is extremely toxic; the probable oral lethal dose for humans is 5-50 mg/kg, or between 7 drops and 1 teaspoonful for a 150 lb. person. It is an irritant to eyes, respiratory tract, mouth and stomach. Damage to kidneys, liver and the nervous system have been reported. (Non-Specific -- Arsenic) Chronic exposure can cause bone marrow damage, often leading to aplastic anemia. There is epidemiological evidence that chronic ingestion of arsenic compounds causes a predisposition to skin cancers.
Fire Hazard
Fire may produce irritating or poisonous gases. When heated to decomposition, CALCIUM ARSENATE produces toxic fumes of arsenic. Avoid heat. Hazardous polymerization may not occur.
Safety Profile
Confirmed human carcinogen. Poison by ingestion. Moderately toxic by skin contact. When heated to decomposition it emits toxic fumes of arsenic.
CALCIUM ARSENATE Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| CLEARSYNTH LABS LTD. | +91-22-45045900 | Hyderabad, India | 6351 | 58 | Inquiry |
| Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6913 | 58 | Inquiry |
| Triveni chemicals | 08048762458 | New Delhi, India | 6093 | 58 | Inquiry |
| Shaanxi Didu New Materials Co. Ltd | +86-89586680 +86-13289823923 | China | 8722 | 58 | Inquiry |
| SUZHOU SENFEIDA CHEMICAL CO.,LTD | +86-0512-83500002 +8615195660023 | China | 23053 | 58 | Inquiry |
| LEAPCHEM CO., LTD. | +86-852-30606658 | China | 43348 | 58 | Inquiry |
| ABCR GmbH & CO. KG | 49 721 95061 0 | Germany | 6846 | 75 | Inquiry |
| United States Biological | 800.520.3011 or 781.639.5092 | United States | 6256 | 80 | Inquiry |
| Shangqiu Ladybug Network Technology Co., LTD | 0370-2070160 17550096163 | China | 2993 | 58 | Inquiry |
| Nantong Zhonghe Chemical New Materials Co., Ltd | 13003551299 13003551299 | China | 7567 | 58 | Inquiry |
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