10103-62-5O=[As]([O-])([O-])[O-].O=[As]([O-])([O-])[O-].[Ca+2].[Ca+2].[Ca+2]RMBBSOLAGVEUSI-UHFFFAOYSA-HCalcium arsenate is a white powder. Slightly soluble in water. Toxic by inhalation and ingestion. Used as an insecticide and germicide.
10103-62-5、7778-44-1DTXSID6058182CHEBI:81880Metals -> Arsenic Compounds, Inorganic
Carcinogens
3.62 (EPA, 1998) - Denser than water; will sink
3.620
3.62 g/cm³
3.62 @25 °C
3.62
White powder
Colorless to white solid.
0.01 % at 77 °F (NIOSH, 2024)
Sol in dil acids
Insol in organic solvents
0.013 G/100 CC OF WATER AT 25 °C
Solubility in water: very poor
(77 °F): 0.01%
Decomposes (NIOSH, 2024)
No boiling point at normal pressure; decomposes on heating
Decomposes
WHEN HEATED TO DECOMP IT EMITS TOXIC FUMES OF ARSENIC.
DANGEROUS WHEN HEATED TO DECOMP ... IT EMITS TOXIC FUMES OF ARSENIC /SRP: INCLUDING ARSINE/. /ARSENIC CMPD/
안전 정보는 참고용이며, 공급업체의 물질안전보건자료(SDS), 관련 법규 및 전문가 평가를 대체하지 않습니다.
Danger
H301+H331 (81.5%): Toxic if swallowed or if inhaled [Danger Acute toxicity, oral; acute toxicity, inhalation]
P203, P261, P264, P270, P271, P273, P280, P301+P316, P304+P340, P316, P318, P321, P330, P391, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 27 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Danger
H301: Toxic if swallowed [Danger Acute toxicity, oral]
REACH registered substance: Calcium arsenate (EC: 231-904-5)
Restricted substance: Calcium arsenate
Substance: Calcium arsenate
Restricted substance: Arsenic acid, calcium salt
The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
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. (EPA, 1998)
· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
This material 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. (EPA, 1998)
Arsenic is absorbed mainly by inhalation or ingestion, as to a lesser extent, dermal exposure. It is then distributed throughout the body, where it is reduced into arsenite if necessary, then methylated into monomethylarsenic (MMA) and dimethylarsenic acid (DMA) by arsenite methyltransferase. Arsenic and its metabolites are primarily excreted in the urine. Arsenic is known to induce the metal-binding protein metallothionein, which decreases the toxic effects of arsenic and other metals by binding them and making them biologically inactive, as well as acting as an antioxidant. (L20)
FOLLOWING DIETARY ADMIN OF 215 MG/KG OF DIET AS CALCIUM ARSENATE ... FOR UP TO 52 DAYS IN RATS, HIGHEST ARSENIC LEVELS (146-537 UG/G DRY TISSUE) ... IN KIDNEYS & LIVER & RELATIVELY LOWER LEVELS IN HAIR, BRAIN, BONE, MUSCLE, & SKIN. LIVER & KIDNEY LEVELS WERE GREATER AFTER ADMIN OF CALCIUM ARSENATE THAN OF ARSENIC TRIOXIDE.
Hamsters were given weekly intratracheal instillations of ... calcium arsenate dust suspensions. Animals were killed at weekly intervals and the concn of arsenic was determined in lung, liver, and hair by atomic absorption spectrophotometry following wet digestion and arsine generation. Animals treated with calcium arsenate had concn of As in the lung about 100 times higher than that of animals given arsenic trisulfide and 1000 times higher than that of animals receiving arsenic trioxide. ... The substantial differentration in lung retention between these inorganic As cmpd is of importance for the design and interpretation of animal carcinogenicity tests involving the respiratory tract and could also have significance in human exposure situations.
Animal data have shown substantial differences in lung retention after intratracheal instillations of arsenic trisulfide, calcium arsenate and arsenic trioxide. Retention of ... arsenic trisulfide was 10 times higher compared to arsenic trioxide.
Has been used as a pesticide; [ACGIH]
No ACTIVE registrants found for selected chemical. [NPIRS]
For Calcium arsenate (USEPA/OPP Pesticide Code: 013501) there are 0 labels match. /SRP: Not registered for current use in the U.S., but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./
현재 필터 조건에 해당하는 반응 기록이 없습니다.
불러오는 중…
2651 °F (EPA, 1998)
Decomposes
1455 °C
1.455 °C
0 mmHg (approx) (NIOSH, 2024)
0 mm Hg @ 20 °C (approx)
0 mmHg (approx)
Calcium arsenate is a white powder. Slightly soluble in water. Toxic by inhalation and ingestion. Used as an insecticide and germicide.
Colorless to white, odorless solid. [insecticide/herbicide]; [NIOSH]
COLOURLESS-TO-WHITE AMORPHOUS POWDER.
Colorless to white, odorless solid. [insecticide/herbicide]
· Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
1573 151
1573 151
DHHS/ATSDR; Toxicological Profile for Arsenic p. 50 (2000). The ATSDR toxicological profile identifies and reviews the key literature that describes a hazardous substance's toxicologic properties. Other pertinent literature is presented in less detail.
Nat'l Research Council Canada; Effects of Arsenic in the Canadian Environment p.122 (1978) NRCC No. 15391
U.S. Environmental Protection Agency's Integrated Risk Information System (IRIS) on Arsenic, inorganic (7440-38-2).[Available from the Substance File List as of March 15, 2000: http://www.epa.gov/iris/subst/index.html]
USEPA; Ambient Water Quality Criteria Doc: Arsenic p.A-2 (1980) EPA 440/5-80-021
For more Special Reports (Complete) data for CALCIUM ARSENATE (6 total), please visit the HSDB record page.
As the federal pesticide law FIFRA directs, EPA is conducting a comprehensive review of older pesticides to consider their health and environmental effects and make decisions about their future use. Under this pesticide reregistration program, EPA examines health and safety data for pesticide active ingredients initially registered before November 1, 1984, and determines whether they are eligible for reregistration. In addition, all pesticides must meet the new safety standard of the Food Quality Protection Act of 1996. Pesticides for which EPA had not issued Registration Standards prior to the effective date of FIFRA, as amended in 1988, were divided into three lists based upon their potential for human exposure and other factors, with List B containing pesticides of greater concern and List D pesticides of less concern. Calcium arsenate is found on List B. Case No: 2020; Pesticide type: insecticide, fungicide, herbicide; Case Status: No products containing the pesticide are actively registered ... The case /is characterized/ as "cancelled." Under FIFRA, pesticide producers may voluntarily cancel their registered products. EPA also may cancel pesticide registrations if registrants fail to pay required fees or make/meet certain reregistration commitments, or if EPA reaches findings of unreasonable adverse effects.; Active ingredient (AI): Calcium arsenate; AI Status: The active ingredient is no longer contained in any registered pesticide products ... "cancelled."
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, liquid, NOS/
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, solid, NOS/
Stay upwind; keep out of low areas. Wear self-contained (positive pressure if available) breathing apparatus and full protective clothing.
In case of fire in the surroundings, use appropriate extinguishing media.
Fresh air, rest. Refer for medical attention.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Seek medical attention if you feel unwell.
Rinse with plenty of water (remove contact lenses if easily possible). Refer for medical attention.
Rinse mouth. Refer immediately for medical attention.
· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.
· Do not touch damaged containers or spilled material unless wearing appropriate protective clothing.
Warning: Effects usually appear within 30 minutes of exposure but may be delayed for several hours. Caution is advised.
General First Aid:
(General first aid procedures)
· Wear positive pressure self-contained breathing apparatus (SCBA).
Biological Exposure Indices (BEI) [ACGIH] - Inorganic arsenic plus methylated metabolites in urine = 35 ug As/L; end of workweek;
Personnel protection: ... Wear positive pressure self contained breathing apparatus when fighting fires involving this material.
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, liquid, NOS/
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, solid, NOS/
Personnel protection: ... Wear positive pressure self-contained breathing apparatus when fighting fires involving this material. /Arsenical cmpd, solid, NOS/
Long-term storage in large, weatherproof, and sift proof storage bins or silos; small amounts may be disposed in a chemical waste landfill.
Protect container against physical damage. Store in well ventilated area away from food or food products and combustible materials. /Inorganic arsenic cmpd/
Prompt cleanup and removal are necessary. Control runoff and isolate discharged material for proper disposal.
Both arsenate and arsenite can be removed from the water column by co-precipitation or adsorption onto iron oxides. Arsenate species can also be removed by adsorption onto aluminum hydroxide and clays, while arsenite is readily adsorbed onto metal sulfides. /Arsenate and arsenite/
Floors and other accessible surfaces contaminated with inorganic arsenic may not be cleaned by the use of compressed air, and shoveling and brushing may be used only where vacuuming or other relevant methods have been tried and found not to be effective. /Inorganic arsenic compounds/
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Recycling: Dissolve in a minimum amt of concentrated hydrochloric acid. Add to water until the appearance of white precipitate. Add 6 M-HCl /6 M-hydrochloric acid/ just to dissolve again. Saturate with hydrogen sulfide. After filtration, wash the precipitate and return to suppliers. Recommendable methods: Chemical treatment, solidification /hazardous waste/, landfill. Not recommendable methods: Thermal destruction, discharge to sewer.
Dissolve in HCl, precipitate as sulfide using H2S, dry, and return to supplier.
Chemical Treatability of Arsenic; Concentration Process: Chemical Precipitation; Chemical Classification: Metal; Scale of Study: Pilot Scale; Type of Wastewater Used: Domestic Wastewater + Pure Compound; Results of Study: 5ppm @ 4gpm @ pH= 7.0. Iron system-90% reduction; low lime system-80% reduction; high lime system-76% reduction; (3 coagulant systems were used; Iron system used 45 ppm as Fe of Fe2(SO4)3 @ pH= 6.0. Low lime system used 20 ppm Fe of Fe2(SO4)3 and 260 ppm of CaO @ pH= 10.0. High lime system used 600 ppm of CaO @ pH= 11.5. Chemical coagulation was followed by multimedia filtration). /Arsenic cmpd/
For more Disposal Methods (Complete) data for CALCIUM ARSENATE (6 total), please visit the HSDB record page.
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Vacuum with specialist equipment or carefully sweep into containers. Carefully collect remainder. Then store and dispose of according to local regulations.
Arsenic poisoning can be treated by chelation therapy, using chelating agents such as dimercaprol, EDTA or DMSA. Charcoal tablets may also be used for less severe cases. In addition, maintaining a diet high in sulfur helps eliminate arsenic from the body. (L20)
INORGANIC ARSENICALS SUCH AS ... CALCIUM ARSENATE CA3(ASO4)2 HAVE BEEN USED FOR MANY YR AS SOIL STERILANTS ... THESE CMPD ARE MOST PERSISTENT SOIL STERILANTS & MAY REMAIN EFFECTIVE FOR ... AS LONG AS 5-8 YR ESPECIALLY IN AREAS OF LOW RAINFALL.
ARSENIC WAS FOUND IN SIGNIFICANT CONCN IN DRAINAGE & RUNOFF WHERE CALCIUM ARSENATE HAD BEEN APPLIED. DRAINAGE FROM PLOTS PREVIOUSLY CORED FOR SOIL SAMPLES CONTAINED CONCN OF 8 PPM. AFTER HEAVY RAIN, SHORTLY AFTER APPLICATION, RUNOFF WAS AS GREAT AS 14 PPM.
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.
inhalation, skin absorption, ingestion, skin and/or eye contact
Oral (L2) ; inhalation (L2) ; dermal (L2)
Arsenic and its metabolites disrupt ATP production through several mechanisms. At the level of the citric acid cycle, arsenic inhibits pyruvate dehydrogenase and by competing with phosphate it uncouples oxidative phosphorylation, thus inhibiting energy-linked reduction of NAD+, mitochondrial respiration, and ATP synthesis. Hydrogen peroxide production is also increased, which might form reactive oxygen species and oxidative stress. Arsenic's carginogenicity is influenced by the arsenical binding of tubulin, which results in aneuploidy, polyploidy and mitotic arrests. The binding of other arsenic protein targets may also cause altered DNA repair enzyme activity, altered DNA methylation patterns and cell proliferation. (T1, A17)
Cough. Sore throat.
Redness. Pain.
Abdominal pain. Diarrhoea. Vomiting. Burning sensation in the throat and chest. Headache. Weakness. Shock or collapse.
lassitude (weakness, exhaustion); gastrointestinal disturbance; peripheral neuropathy; skin hyperpigmentation, palmar planter hyperkeratoses; dermatitis; ; In Animals: liver damage [potential occupational carcinogen]
Exposure to lower levels of arsenic can cause nausea and vomiting, decreased production of red and white blood cells, abnormal heart rhythm, damage to blood vessels.
This substance may be hazardous to the environment. Special attention should be given to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal.
Vineyard workers in Germany and France have received heavy exposure to arsenical insecticides through inhalation of lead, calcium, and copper arsenate dust and through the ingestion of contaminated wine. The concurrence of arsenicism and lung cancer was observed in post mortem studies of those vineyard workers who showed cutaneous stigmata of arsenic toxicity at death: lung cancer occurred in 12 out of 27 men autopsied and liver hemangioendothelioma in two.
... OF COMPOUNDS TO WHICH SPRAYERS OF ORCHARDS ARE EXPOSED, CALCIUM ARSENATE IS THE MOST TOXIC; NEXT IS LEAD ARSENATE; & THIRD IS LEAD CARBONATE.
As the federal pesticide law FIFRA directs, EPA is conducting a comprehensive review of older pesticides to consider their health and environmental effects and make decisions about their future use. Under this pesticide reregistration program, EPA examines health and safety data for pesticide active ingredients initially registered before November 1, 1984, and determines whether they are eligible for reregistration. In addition, all pesticides must meet the new safety standard of the Food Quality Protection Act of 1996. Pesticides for which EPA had not issued Registration Standards prior to the effective date of FIFRA, as amended in 1988, were divided into three lists based upon their potential for human exposure and other factors, with List B containing pesticides of greater concern and List D pesticides of less concern. Calcium arsenate is found on List B. Case No: 2020; Pesticide type: insecticide, fungicide, herbicide; Case Status: No products containing the pesticide are actively registered ... The case /is characterized/ as "cancelled." Under FIFRA, pesticide producers may voluntarily cancel their registered products. EPA also may cancel pesticide registrations if registrants fail to pay required fees or make/meet certain reregistration commitments, or if EPA reaches findings of unreasonable adverse effects.; Active ingredient (AI): Calcium arsenate; AI Status: The active ingredient is no longer contained in any registered pesticide products ... "cancelled."
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, liquid, NOS/
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. /Arsenical cmpd, solid, NOS/
Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious health problems. The Clean Air Act, as amended in 1990, directs EPA to set standards requiring major sources to sharply reduce routine emissions of toxic pollutants. EPA is required to establish and phase in specific performance based standards for all air emission sources that emit one or more of the listed pollutants. Calcium arsenate is included on this list.
(a) The owner or operator of an existing glass melting furnace subject to the provisions of this subpart shall comply with either paragraph (a)(1) or (a)(2) of this section ... (1) Uncontrolled total arsenic emissions from the glass melting furnace shall be less than 2.5 Mg (2.7 ton) per year, or ... (2) Total arsenic emissions from glass melting furnace shall be conveyed to a control device and reduced by at least 85%. /Total arsenic/
(b) The owner or operator of a new or modified glass melting furnace subject to the provisions of this subpart shall comply with either paragraph (b)(1) or (b)(2) of this section ... (1) Uncontrolled total arsenic emissions from the glass melting furnace shall be less than 0.4 Mg (0.44 ton) per year, or ... (2) Total arsenic emissions from glass melting furnace shall be conveyed to a control device and reduced by at least 85%. /Total arsenic/
The owner or operator of each copper converter subject to the provisions of this subpart shall reduce inorganic arsenic emissions to the atmosphere by meeting the following design, equipment, work practice, and operational requirements: (1) Install, operate, and maintain a secondary hood system on each copper converter. Each secondary hood system shall consist of a hood enclosure, air curtain fan(s), exhaust system fan(s), and ductwork that conveys the captured emission to a control device ... (2) Optimize the capture of secondary inorganic arsenic emission by operating the copper converter and secondary hood systems at all times ... . /Inorganic arsenic/
For more Atmospheric Standards (Complete) data for CALCIUM ARSENATE (6 total), please visit the HSDB record page.
Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 1 lb or 0.454 kg. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b).
Releases of CERCLA hazardous substances are subject to the release reporting requirement of CERCLA section 103, codified at 40 CFR part 302, in addition to the requirements of 40 CFR part 355. Calcium arsenate is an extremely hazardous substance (EHS) subject to reporting requirements when stored in amounts in excess of its threshold planning quantity (TPQ) of 500 or 10,000 lbs. Extremely hazardous substances that are solids are subject to either of two threshold planning quantities ... The lower quantity applies only if the solid exists in powdered for and has a particle size less than 100 microns; or is handled in solution or in molten form; or meets the criteria for a National Fire Protection Association (NFPA) rating of 2, 3 or 4 for reactivity. If the solid does not meet any of these criteria, it is subject to the upper ... threshold planning quantity ... .
Calcium arsenate is designated as a hazardous substance under section 311(b)(2)(A) of the Federal Water Pollution Control Act and further regulated by the Clean Water Act Amendments of 1977 and 1978. These regulations apply to discharges of this substance. This designation includes any isomers and hydrates, as well as any solutions and mixtures containing this substance.
Toxic pollutant designated pursuant to section 307(a)(1) of the Federal Water Pollution Control Act and is subject to effluent limitations. /Arsenic & cmpd/
For the maximum protection of human health from the potential carcinogenic effects due to exposure of arsenic through ingestion of contaminated water & contaminated aquatic organisms, the ambient water concn should be zero based on the nonthreshold assumption for this chemical. However, zero level may not be attainable at the present time. Therefore, the levels which may result in incremental increase of cancer risk over the lifetime are estimated at 1X10-5, 1X10-6, & 1X10-7. The corresponding criteria are 22 ng/l, 2.2 ng/l, & .22 ng/l, respectively .... For consumption of aquatic organisms only, excluding consumption of water, the levels are 175 ng/ml, 17.5 ng/l, & 1.75 ng/l, respectively. /Arsenic/
D004; A solid waste containing arsenic may or may not become characterized as a hazardous waste when subjected to the Toxicity Characteristic Leaching Procedure listed in 40 CFR 261.24, and if so characterized, must be managed as a hazardous waste.
(AZ) ARIZONA 10 ug/L /Arsenic/
(CT) CONNECTICUT 10 ug/L /Arsenic/
10 ug/L /Arsenic/
Maximum Contaminant Level: 0.010 mg/L /Arsenic/
Insecticide; as molluscicide /Former use/
USED FOR PRE-EMERGENCE TREATMENT OF TURF & LAWNS TO CONTROL CRABGRASS ... BLUEGRASS, CHICKWEED, & CERTAIN SOIL INSECTS INCL JAPANESE BEETLE GRUBS.
AT ONE TIME WIDELY USED AGAINST LEAF-EATING INSECTS, & STILL USED ON TOBACCO. /FORMER USE/
Commercial calcium arsenate contains 61% calcium arsenate and 9% calcium arsenite and an excess of lime and calcium carbonate.
The wettable powder, when made up in aq solution, should contain less than 0.5% of dissolved As2O5, which originates from impurities.
(1978) 3.18X10+7 G
(1982) 2.27X10+5 G
(1978) PROBABLY GREATER THAN 4.54X10+5 G
(1983) NOT PRODUCED COMMERCIALLY IN USA
Arsenicals are still widely utilized inorganic insecticides. The USDA (1971) data showed that 9 million pounds of calcium and lead arsenate were produced in the United States in 1969.
In 1942, 38 million kilograms.
ESSENTIALLY 100% AS PESTICIDE
Became the most widely used insecticide during the first half of the 20th century.
... PRODUCED BY INTERACTION OF ARSENIC ACID & CALCIUM HYDROXIDE IN PROPORTIONS THAT YIELD ARSENATES MORE BASIC THAN CALCIUM HYDROGEN ARSENATE ...
Prepn: Les Veaux, US patent 2,715,562 (1955 to FMC).
... PRODUCED BY (A) THE OXIDATION OF A SODIUM ARSENITE SOLN IN AIR IN THE PRESENCE OF A CATALYST (COPPER SULFATE) & PRECIPITATION USING MILK OF LIME OR (B) THE ACTION OF ARSENIC ACID ON MILK OF LIME.
Interaction of calcium chloride and sodium arsenate
USEPA/OPP Pesticide Code 013501; Trade Names: Pencal; Security (Trade name for lead arsenate also); Turf-Cal; Chip-Cal; SPRA-Cal.
GRADES OR PURITY: 70%, CONTAINING CALCIUM CARBONATE & CALCIUM HYDROXIDE (LIMESTONE & SLAKED LIME).
Grades: technical; chemically pure
Turf-Cal: contains 26% tricalcium arsenate, equivalent to 10% arsenic as metallic. No more than 5% arsenic is in the water soluble form.
THE COMMERCIAL GRADE IS A COMPLEX MOLECULAR MIXT CONTAINING 26% ARSENIC. IT IS OFTEN COLORED WITH SMALL AMT OF PINK DYE.
Arsenic acid (H3AsO4), calcium salt (2:3): ACTIVE
IT IS ... COMPATIBLE WITH MATERIALS SUCH AS LIME SULFUR. ... IT HAS METALLIC ARSENIC EQUIVALENT OF 25-30%, ABOUT A THIRD MORE THAN LEAD ARSENATES.
PRECISE NATURE OF COMPOUNDS PRESENT IN CALCIUM ARSENATE FOR CROP PROTECTION USE IS UNKNOWN BUT PHASE RULE STUDIES INDICATE PRESENCE OF SEVERAL BASIC CALCIUM ARSENATES, E.G. 3CA(ASO4)2.CA(OH)2
... Must be colored when used as a commercial product. Incompatability: Not miscible with oils and acidic preparations.