Calcium oxalate

Calcium oxalate Basic information
Product Name:Calcium oxalate
Synonyms:CALCIUM OXALATE;Calcium oxalate 99.999% metals basis;Calciumoxalat-1-hydrat;RAPHIDES;Oxalic acid calcium;calcium ethanedioate;CalciuM oxalate, Puratronic|r, 99.999% (Metals basis);Calcium oxalate 99.999% trace metals basis
CAS:563-72-4
MF:C2H4CaO4
MW:132.13
EINECS:209-260-1
Product Categories:Calcium Salts;Metal and Ceramic Science;Salts
Mol File:563-72-4.mol
Calcium oxalate Structure
Calcium oxalate Chemical Properties
Melting point decomposes [CRC10]
density 2.2 g/mL at 25 °C (lit.)
form Powder
color White
Water Solubility g/L solution H2O: 0.0069 (25°C), 0.0142 (95°C); solid phase, CaC2O4 ·H2O [KRU93]; soluble dilute HCl, HNO3 [HAW93]
Merck 13,1690
Stability:Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference563-72-4(CAS DataBase Reference)
EPA Substance Registry SystemEthanedioic acid, calcium salt (1:1) (563-72-4)
Safety Information
Hazard Codes Xn
Risk Statements 20/21/22-36/37/38-21/22
Safety Statements 26-37/39-24/25
WGK Germany 3
MSDS Information
ProviderLanguage
SigmaAldrich English
Calcium oxalate Usage And Synthesis
DescriptionCalcium oxalate (in archaic terminology, oxalate of lime) is a chemical compound that forms envelope-shaped crystals, known in plants as raphides. A major constituent of human kidney stones, the chemical is also found in beerstone, a scale that forms on containers used in breweries. Its chemical formula is CaC2O4 or Ca (COO)2.
Chemical Propertiescolourless crystals
Chemical PropertiesCalcium oxalate is white precipitate, insoluble in weak acids, but soluble in strong acids, formed by reaction of soluble calcium salt solution and ammonium oxalate solution. Solubility at 18 °C 0.0056 g anhydrous salt per liter of saturated solution.
Physical propertiesMost crystals look like a 6 sided prism and often look like a pointed picket from a wooden fence. More than 90 % of the crystals in a urine sediment will have this type of morphology. These other shapes are less common than the 6 sided prism, however it is important to be able to quickly identify them in case of emergency.
OccurrenceMany plants are accumulating calcium oxalate (it has been reported in 1000 genera of tree ). The calcium oxalate accumulation is linked to the detoxification of calcium (Ca2+) in the plant.
Calcium oxalate is a poisonous substance that can produce sores and numbing on ingestion and could even be fatal.
The poisonous plant dumb cane (Dieffenbachia) contains the substance and on ingestion can prevent speech and be suffocating. It is also found in rhubarb (in large quantities in the leaves) and in species of Oxalis, Araceae, taro, kiwifruit, tea leaves, agaves, and Alocasia and in spinach in varying amounts. Insoluble calcium oxalate crystals are found in plant stems, roots, and leaves and produced in idioblasts. Calcium oxalate, as ' beer stone ', is a brownish precipitate that tends to accumulate within vats, barrels and other containers used in the brewing of beer.

DefinitionChEBI: The calcium salt of oxalic acid, which in excess in the urine may lead to formation of oxalate calculi (kidney stones).
ApplicationCalcium oxalate is used in the manufacture of ceramic glazes.
General DescriptionPurity based on trace metal analysis
Health HazardEven a small dose of calcium oxalate is enough to cause intense sensations of burning in the mouth and throat, swelling, and choking that could last for up to two weeks . In greater doses it can cause severe digestive upset, breathing difficulties, coma or even death. Recovery from severe oxalate poisoning is possible, but permanent liver and kidney damage may have occurred.
The stalks of plants in the Dieffenbachia genus produce the most severe oxalate reactions. The needle - like oxalate crystals produce pain and swelling when they contact lips, tongue, oral mucosa, conjunctiva, or skin. Edema primarily is due to direct trauma from the needle-like crystals and, to a lesser extent, by other plant toxins (e.g., bradykinins, enzymes).
Depending on the plant ingested, mild (Elephant Ear Colocasia esculenta) to more severe (Jack in the Pulpit, Arisaema) can cause compromised airways. One bite on the Arisaema seed pod will result in immediate swelling and burning. It will take over 12 hours for the swelling to subside .
4 – 1 - Treatment
Medication administered at the emergency room may include diphenhydramine, epinephrine, or famotidine, all intravenously. Although this most likely will be a localized reaction, it will be treated by the ER as an anaphylactic reaction.



Calcium oxalate Preparation Products And Raw materials
Preparation ProductsOxalic acid-->Sodium erythorbate-->CALCIUM SULFATE-->Aminoguanidine bicarbonate-->Calcium sulfate dihydrate-->D-(-)-Arabinose
Oxalic acid Calcium oxalate tetrahydrate Oxalic acid dihydrate CALCIUM OXALATE GROWTH INHIBITOR P Calcium formate Calcium carbonate Calcium methoxide Calcium chloride calcium oxalate crystal growth inhibitor cationic protein, urate-calcium oxalate stone Basic Green 4 CALCIUM Calcium Propionate calcium oxalate dihydrate CALCIUM OXALATE MONOHYDRATE Calcium oxalate Calcium hydroxide Calcium citrate

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