Formic acid danger from formic acid is from skin or eye contact with the concentrated liquid or vapors. The U.S. OSHA Permissible Exposure Level (PEL) of formic acid vapor in the work environment is 5 parts per million parts of air (ppm). Formic acid Formic acid, systematically named methanoic acid, is the simplest carboxylic acid. The chemical formula is HCOOH or HCOH. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants. The word "formic" comes from the Latin word for ant, "formica", referring to its early isolation by the distillation of ant bodies. Esters, salts,
Acetic acid nomenclature. The name "acetic acid" derives from "acetum", the Latin word for vinegar, and is related to the word acid itself. "Glacial acetic acid" is a name for water-free (anhydrous) acetic acid. Similar to the German name "Eisessig" ("ice-vinegar"), the name comes from the ice-like crystals that form slightly below room temperature at (the presence of 0.1% water lowers its melting point by 0.2 °C). A common symbol for acetic acid is "AcOH", where "Ac" is the pseudoelement symbol representing the acetyl group −C(=O)−; the conjugate base, acetate (), is thus represented as "AcO". (The "Ac" is not to be