Views: 1265 Author: Site Editor Publish Time: 2022-03-16 Origin: Site
Glyoxylic acid is an important organic chemical material, which exists in the body fluids of immature fruits and some animal tissues. Glyoxylic acid, a white columnar crystal, is also known as formaldehyde formic acid, dihydroxyacetic acid, oxyacetic acid, aldehyde formic acid, formyl formic acid, etc. Its English name is Glyoxylicacid, its molecular formula is C2H2O3, and its relative molecular weight is 74.04. The aqueous solution is colorless and transparent. The melting point of semi aqueous compound is 70-75 ℃, and the melting point of anhydrous substance is 98 ℃. Easily soluble in water, slightly soluble in ethanol, ether and benzene, insoluble in esters and aromatic solvents. Its aqueous solution is stable in air, glyoxylic acid exists in the form of hydrate in aqueous solution, and the commodity is often made into syrup or aqueous solution with different concentrations.
Glyoxylic acid is a simple Z aldehyde acid. There are two functional groups, aldehyde group and carboxyl group, in the molecule. Therefore, glyoxylic acid has the properties of both aldehyde and carboxylic acid, and has a variety of reaction activities. Commercial glyoxylic acid often appears in the form of its aqueous solution. In the past, the content of glyoxylic acid was mostly 20%. At present, it generally refers to the products with 40% or 50% content. Glyoxylic acid has the dual characteristics of aldehyde and acid. It can react with aldehyde and acid at the same time, and sometimes cyclization or condensation reaction can occur, which results in dozens of fine chemical products with wide applications. It is an important organic synthesis intermediate.
Do you know the use of glyoxylic acid ?
Glyoxylic acid is an important fine chemical raw material, which is widely used. In medicine, glyoxylic acid can be used to synthesize oral penicillin, allantoin (used as a good healing agent for skin trauma, an additive for high-end cosmetics, and a plant growth regulator), p-hydroxyphenylglycine, p-hydroxyphenylacetic acid, mandelic acid, acetophenone α- Thiophenyl glycolic acid, p-hydroxyphenylacetamide (used to manufacture atel, an effective drug for the treatment of cardiovascular diseases and hypertension), etc; In perfume, glyoxylic acid can be used to synthesize vanillin, ethyl vanillin, piperonal (piperonal), p-methoxybenzaldehyde (anisaldehyde), etc; In terms of pesticides, glyoxalic acid can be used to produce glyphosate, chlorpheniram, dimehypo, quinalphos, gramophore, etc