Types and uses of laboratory flasks

Laboratory Flasks are useful types of chemistry glassware for containing liquid and performing mixing, heating, cooling, precipitation, condensation, and other processes. These flasks –also known as a science flask, chemistry flask, or a laboratory flask (lab flask)– come in a range of sizes, materials, and uses.

Commonly used types of chemistry flasks include:

  1. Nitrogen flask

Alias: Kjeldahl flask

Uses: It is suitable for the analysis of nitrogen in organic matter in agricultural science experiments and research institutes, such as digestion reaction and distillation of ammonia. Generally, more than six are needed at a time.


2.Round-bottomed flask

Fractionation flask

Uses: Suitable for the fractionation or separation of some organic compounds in the laboratory.

Features: In order to avoid boiling in the boiling temperature of the bottle during the distillation, the liquid enters the branch pipe and flows into the condensing pipe. The product contaminated by the distillation affects the purity of the distillation and is designed.


3.Distillation flask

Uses: It is used for liquid distillation or fractionation, and it is often used together with condenser pipe, liquid pipe and liquid adapter. It is also possible to assemble a gas generator.

Features: Due to the need to fractionate the liquid, there is a thin glass tube protruding slightly downward at the neck of the bottle for drainage. When the distillation flask is heated to block the mouth of the bottle, another tube must be extended.

distilling flask with side tube

4.Pear flask

Uses: Used on rotary evaporators to increase liquid surface area and accelerate solvent evaporation. The resulting organic matter will flow to the bottom of the pear bottle to facilitate removal and reduce losses.


5.Eggplant flask

Uses: It is suitable for the test of thick substances or for accepting bottles. It can be scraped directly with a scraper with its shoulders as a sloped thick substance.


6.Multi-necked flask

Classification: two-necked flask, straight three-burn, three-necked flask, straight four-necked flask, and four-necked flask. The upper port can be used in combination with some instruments that connect the separatory funnel, cooler, and thermometer.

Uses: liquid-solid or liquid-liquid reactor; gas reaction generator; distillation or fractionation liquid.

boiling flask round bottom with three necks

Lab Glassware information
About WuBo laboratory glassware

Leave a Reply

Your email address will not be published. Required fields are marked *

WhatsApp chat