- Laboratory flask
Laboratory flasks are vessels (containers) which fall into the category of
laboratoryequipment known as glassware. In laboratory and other scientific settings, they are usually referred to simply as flasks. Flasks come in a number of shapes and a wide range of sizes, but a common distinguishing aspect in their shapes is a wider vessel "body" and one (or sometimes more) narrower tubular sections at the top called necks which have an opening at the top. Laboratory flask sizes are specified by the volume they can hold, typically in metric units such as milliliters (mL or ml) or liters (L or l). Laboratory flasks have traditionally been made of glass, but can also be made of plastic.
At the opening(s) at top of the neck of some glass flasks such as
round-bottom flasks, retorts, or sometimes volumetric flasks, there are outer (or female) tapered (conical) ground glass joints. Some flasks, especially volumetric flasks, come with a stopper or cap for capping the opening at the top of the neck. Such stoppers can be made of glass or plastic. Glass stoppers typically have a matching tapered inner (or male) ground glass joint surface, but often only of stopper quality. Flasks which do not come with such stoppers or caps included may be capped with a rubber bungor cork stopper.
Flasks can be used for making solutions or for holding, containing, collecting, or sometimes volumetrically measuring
chemicals, samples, solutions, etc. for chemical reactions or other processes such as mixing, heating, cooling, dissolving, precipitation, boiling(as in distillation), or analysis.
List of flasks
There are several types of laboratory flasks, all of which have different functions within the laboratory. The most common types of flask are:
Like many other common pieces of glassware, Erlenmeyer flasks could potentially be used in the production of illegal narcotics. In an effort to restrict such production, some U.S. states (including Texas) have begun requiring permits to purchase such glassware, including Erlenmeyer flasks, as well as chemicals identified as common starting materials. [http://www.thecb.state.tx.us/reports/PDF/1210.PDF Memorandum of Understanding between the Texas Department of Public Safety and the Texas Higher Education Coordinating Board] (PDF)
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Look at other dictionaries:
Flask — may refer to: *Vacuum flask a container designed to keep warm drinks warm and refrigerated drinks cold *Hip flask, a small container used to carry a small amount of liquid *Laboratory flask, laboratory glassware for holding larger volumes than… … Wikipedia
laboratory apparatus — ▬▬▬▬▬▬▬▬ Laboratory apparatus includes: autoclave beaker bell jar boiling tube Büchner funnel Bunsen burner burette centrifuge clamp condenser conical flask crucible cylinder desiccator distillation apparatus dropper electron microscope eva … Useful english dictionary
flask — [fla:sk US flæsk] n [Date: 1300 1400; : Late Latin; Origin: flasco] 1.) BrE a special type of bottle that you use to keep liquids either hot or cold, for example when travelling = ↑Thermos 2.) a ↑hip flask 3.) a glass bottle with a narrow top,… … Dictionary of contemporary English
Laboratory glassware — Three beakers, a conical flask, a graduated cylinder and a volumetric flask … Wikipedia
flask — A small receptacle, usually of glass, used for holding liquids, powder, or gases. [M.E. keg, fr. Fr. flasque, fr. Germanic] casting f. SYN: refractory f.. crown f. SYN: denture f.. denture f. a sectional metal boxlike case in which a sectional… … Medical dictionary
flask — flask1 /flask, flahsk/, n. 1. a bottle, usually of glass, having a rounded body and a narrow neck, used esp. in laboratory experimentation. 2. a flat metal or glass bottle for carrying in the pocket: a flask of brandy. 3. an iron container for… … Universalium
flask — noun /flɑːsk,flæsk/ a) A container used to discreetly carry a small amount of a hard alcoholic beverage; a pocket flask. b) Laboratory glassware used to hold larger volumes than test tubes, normally having a narrow mouth of a … Wiktionary
flask — flÃ¦sk /flÉ‘Ësk n. round glass bottle with a long narrow neck (used in laboratory experiments); small glass or metal bottle with a screw on lid; box, container (used in casting metal) … English contemporary dictionary
flask — noun (C) 1 BrE a special type of bottle that you use to keep liquids either hot or cold, for example when travelling 2 a flat bottle usually used to carry alcohol 3 a glass bottle with a narrow top, used in a laboratory … Longman dictionary of contemporary English
Erlenmeyer flask — laboratory flask with a narrow neck and a wide base that is used to mix fluids (designed by Richard August Carl Emil Erlenmeyer) … English contemporary dictionary