November 2, 2021

It is known as a kitasato flask, it is a flask that is classified as glass material in laboratories and is used to perform experiments with water.

What is it?

It is an Erlenmeyer flask with the particularity of having a detachment tube or lateral tubulature. It is used to carry out experiments with water such as distillation, gas collection, vacuum filtration and other processes. It can be said that its main use is related to the separation of mixtures that have solid, liquid and gaseous substances.

It is a thick glass bottle with a cone shape, it has an elongated neck and a thin tube at the top and side. It was invented by the Japanese doctor and bacteriologist Shibasaburo Kitasato.

This flask allows you to isolate gaseous substances from others that accompany it due to the thin tube that is in its neck.

Kitasato flask features

  • It is a very thick glass bottle, it is designed to be used in conditions where the pressure can change abruptly.
  • It has a cone shape, an elongated neck, and an opening at the top that opens into a thin tube.
  • Its most common use is vacuum filtration.
  • The side tube allows gases to separate from the compound, so it can be isolated for separate study.


It is designed to perform water-related experiments. Its structure is prepared to withstand sudden pressure changes.

With this flask you can perform:

Distillation: It is the process by which a volatile substance is separated from a compound. For this, the mixture is brought to the boiling temperature of the substance to convert it into gas, then it is condensed to recover it in another container.

Volume displacement: It allows identifying the exact volume of a waterproof object by observing its behavior within a liquid. It is ideal for determining the volume of irregular objects.

Vacuum Filtration: Separates mixtures containing solid and liquid elements. A vacuum pump and a Büchner funnel are used, to which a filter is attached. The Büchner funnel is placed on the Kitasato.

This technique is used when you want to recover solid substances from a highly viscous compound or if the solids are small. Generating a vacuum increases the speed at which a substance is filtered.

Advantages of using the Kitasato flask

  • It allows to isolate gaseous substances.
  • It is a very stable flask and reduces the risk of spillage. Its narrow mouth reduces evaporation and contamination of substances.
  • If nozzles are not used, they can be covered with cotton or plugs.
  • Solutions can be safely mixed and shaken in kitasate.
Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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