Commonly used laboratory acids can include: Hydrochloric acid, sulfuric acid, nitric acid, and phosphoric acid. Due to the nature of the chemical, one must be cautious when selecting the correct bottletop dispenser. Although dispenser are made to handle a variety of laboratory industries, applications with acids can suggest a specific selection of equipment. Highly corrosive chemicals should be used with dispensing units made of chemically resistant material because long term exposure of a particular chemical that may wear the unit’s parts. These material alternatives will be found in the valves, connections, and pistons. Additionally it is important to keep in mind daily rinsing of a device if the acid is subject to crystallization.