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
Sulfuric acid drain cleaners, as an electrolyte in lead-acid batteries and in various cleaning agents. Although nearly 100% sulfuric acid can be made, the subsequent loss of at the boiling point brings the concentration to 98.3% acid. The 98% grade is more stable in storage, and is the usual form of what is described as "concentrated sulfuric acid". Other concentrations are used for different purposes. Some common concentrations are: "Chamber acid" and "tower acid" were the two concentrations of sulfuric acid produced by the lead chamber process, chamber acid being the acid produced in the lead chamber itself (<70% to avoid contamination