C6H4O4

	C6H4O4 The molecular formula C6H4O4 may refer to: Coumalic acid Dihydroxybenzoquinones 2,3-Dihydroxy-1,4-benzoquinone 2,5-Dihydroxy-1,4-benzoquinone 2,6-Dihydroxy-1,4-benzoquinone 3,4-Dihydroxy-1,2-benzoquinone 3,5-Dihydroxy-1,2-benzoquinone 3,6-Dihydroxy-1,2-benzoquinone ** 4,5-Dihydroxy-1,2-benzoquinone * 5-Carboxyfurfuraldehyde * 2-Furylglyoxylic acid * 3-Furylglyoxylic acid See also * Hydroxybenzoquinone A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivat ... {{Molecular formula index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	2,5-Dihydroxy-1,4-benzoquinone 2,5-Dihydroxy-1,4-benzoquinone or 2,5-dihydroxy-''para''-benzoquinone is an organic compound with formula , formally derived from 1,4-benzoquinone by replacing two hydrogen atoms with hydroxyl (OH) groups. It is one of seven dihydroxybenzoquinone isomers. It is a yellow solidOnkar Singh, Aran Kumar, and Karan Singh (2012)"Polymeric complexes of 2,5-Dihydroxy-1,4-benzoquinone with some Lanthanides" International Journal of Scientific and Research Publications, volume 2, issue 9 ISSN 2250-3153 with planar molecules that exhibits ferroelectric properties. The compound is a weak acid: one or both hydroxyls can lose a proton to yield the anions (pKa1 = 2.95) and (pKa2 = 4.87), respectively. The latter forms a variety of metal complexes, functioning as a binucleating ligand. The compound has been identified as partly responsible for the color of aged cellulosic materials.Hosoya, Takashi; French, Alfred D.; Rosenau, Thomas "Chemistry of 2,5-dihydroxy- ,4benzoquinone, a key chromo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Coumalic Acid Coumalic acid is an organic compound with the molecular formula C6H4O4. Its melting point is around 210 °C. In laboratory coumalic acid may be obtained by self-condensation of malic acid Malic acid is an organic compound with the molecular formula . It is a dicarboxylic acid that is made by all living organisms, contributes to the sour taste of fruits, and is used as a food additive. Malic acid has two stereoisomeric forms ( ... in fuming sulfuric acid: : References {{Reflist 2-Pyrones Carboxylic acids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Dihydroxybenzoquinone A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivative where any number ''n'' of hydrogens have been replaced by ''n'' hydroxyls, so that the formula is . In this case the number ''n'' (which is between 1 and 4) is indicated by a multiplier prefix (mono-, di-, tri-, tetra-, penta-, or hexa-). The unqualified term "hydroxybenzoquinone" usually means a derivative of 1,4-benzoquinone. Other hydroxy- compounds can be derived from the other isomer, namely 1,2-benzoquinone or ''ortho''-benzoquinone. The IUPAC nomenclature uses dihydrobenzenedione instead of "benzoquinone", with the necessary prefixes to indicate the positions of the carbonyl oxygens (=O) — as in 2,3-dihydroxy-1a,4a-dihydrobenzene-1,4-dione (= 2,3-dihydroxy-1,4-benzoquinone). The hydroxybenzoquinones (in the particular or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Molecular Formula In chemistry, a chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and ''plus'' (+) and ''minus'' (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than chemical names and structural formulae. The simplest types of chemical formulae are called '' empirical formulae'', which use letters and numbers indicating the numerical ''proportions'' of atom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]