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Oxalate (systematic IUPAC name: ethanedioate) is an anion with the chemical formula C 2 O 2− 4. This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (Na 2 C 2 O 4), and several esters such as dimethyl oxalate ((CH 3) 2 C 2 O 4). It is a conjugate base of oxalic acid.
In chemistry, an oxocarbon anion is a negative ion consisting solely of carbon and oxygen atoms, and therefore having the general formula C x O n− y for some integers x, y, and n. The most common oxocarbon anions are carbonate, CO 2− 3, and oxalate, C 2 O 2− 4. There are however a large number of stable anions in this class, including ...
It is a reducing agent [9] and its conjugate bases hydrogen oxalate (HC 2 O − 4) and oxalate (C 2 O 2− 4) are chelating agents for metal cations. It is used as a cleaning agent, especially for the removal of rust , because it forms a water-soluble ferric iron complex, the ferrioxalate ion.
Hydrogenoxalate or hydrogen oxalate (IUPAC name: 2-Hydroxy-2-oxoacetate) is an anion with chemical formula HC 2 O − 4 or HO−C(=O)−CO − 2, derived from oxalic acid by the loss of a single proton; or, alternatively, from the oxalate anion C 2 O 2− 4 by addition of a proton. The name is also used for any salt containing this anion.
The carbonate oxalates are mixed anion compounds that contain both carbonate (CO 3) and oxalate (C 2 O 4) anions. Most compounds incorporate large trivalent metal ions, such as the rare earth elements. Some carbonate oxalate compounds of variable composition are formed by heating oxalates. [1]
Its formula is often written as (NH 4) 2 C 2 O 4 or (COONH 4) 2. It is an ammonium salt of oxalic acid. It consists of ammonium cations ([NH 4] +) and oxalate anions (C 2 O 2− 4). The structure of ammonium oxalate is ([NH 4] +) 2 [C 2 O 4] 2−. Ammonium oxalate sometimes comes as a monohydrate ([NH 4] 2 C 2 O 4 ·H 2 O). It is a colorless or ...
Dietary oxalate is an organic ion found in many vegetables, fruits, and nuts. Calcium from bone may also play a role in kidney stone formation. In one study of modulators of calcium oxalate crystallization in urine, magnesium- alkali citrate was shown to inhibit CaO x (calcium oxalate) crystallization, “probably via actions of the citrate ...
Copper(II) oxalate are inorganic compounds with the chemical formula CuC 2 O 4 (H 2 O) x. The value of x can be 0, 0.44, and 1. The value of x can be 0, 0.44, and 1. Two of these species are found as secondary minerals (degradation of minerals), whewellite (monohydrate) and moolooite (0.44 hydrate). [ 3 ]