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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.
Oxaloacetic acid (also known as oxalacetic acid or OAA) is a crystalline organic compound with the chemical formula HO 2 CC(O)CH 2 CO 2 H. Oxaloacetic acid, in the form of its conjugate base oxaloacetate, is a metabolic intermediate in many processes that occur in animals.
In enzymology, an oxaloacetase (EC 3.7.1.1) is an enzyme that catalyzes the chemical reaction: [1] oxaloacetate + H 2 O ⇌ {\displaystyle \rightleftharpoons } oxalate + acetate Thus, the two substrates of this enzyme are oxaloacetate and H 2 O , whereas its two products are oxalate and acetate .
Oxalic acid is an organic acid with the systematic name ethanedioic acid and chemical formula HO−C(=O)−C(=O)−OH, also written as (COOH) 2 or (CO 2 H) 2 or H 2 C 2 O 4.It is the simplest dicarboxylic acid.
Ammonium oxalate is a chemical compound with the chemical formula [N H 4] 2 C 2 O 4. 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−.
formula system space group unit cell Å volume density comment ref lithium sulfate monohydrate oxalate ? triclinic P1 a = 3.4014 b = 5.0397 c = 6.120 α = 78.62° β= 84.95° γ = 81.14° 101.45 band gap 4.57 eV dielectric constant 29.7 stable below 83 °C piezoelectric coefficient 6pC/N [3] homopiperazinium dimagnesium dioxalate sulfate dihydrate
Calcium oxalate (in archaic terminology, oxalate of lime) is a calcium salt of oxalic acid with the chemical formula CaC 2 O 4 or Ca(COO) 2. It forms hydrates CaC 2 O 4 ·nH 2 O, where n varies from 1 to 3. Anhydrous and all hydrated forms are colorless or white.
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]