Formic anhydride can be isolated by low-temperature, low-pressure distillation, but decomposes on heating above room temperature. It decomposes into formic acid and carbon monoxide. The decomposition of formic anhydride may be catalyzed by formic acid. Formic anhydride can be detected in the gas-phase reaction of ozone with ethylene. The molecule is planar in the gas phase. Formic anhydride Formic anhydride, also called methanoic anhydride, is an organic compound with the chemical formula and a structural formula of (H(C=O)−)O. It can be viewed as the anhydride of formic acid (HCOOH). Formic anhydride can be obtained by reaction of formyl fluoride with sodium formate
Butyric acid it was not until 1823 that he presented the properties of butyric acid in detail. The name of butyric acid comes from the Latin word for butter, "butyrum" (or "buturum"), the substance in which butyric acid was first found. Industrially, butyric acid is prepared by fermentation of sugar or starch, made more efficient by use of "Clostridium tyrobutyricum" in a process called catalytic upgrading. Salts and esters of the acid are called butyrates or butanoates. Butyric acid or fermentation butyric acid is also present as the octyl ester (octyl butyrate) in parsnip ("Pastinaca sativa") and in the fruit of the