Organic reagents, also known as organic chemistry reagents, are carbon-based compounds or mixtures that cause a chemical reaction for producing, measuring, or detecting another substance. An organic reagent may be synthesized from inorganic materials. Certain organic chemistry reagents are certified by the American Chemical Society (ACS) and may be designated as high-performance liquid chromatography (HPLC) grade. They may be in liquid, powder, crystal, or granular form. In general, a container of organic chemistry reagent is labeled with the Chemical Abstracts Service (CAS) number, chemical name, weight or volume, and other information specific to the reagent. Organic chemistry reagents are commonly found in educational settings as well as professional research and development laboratories.