Glass Stopper For Still Flask 24/40

A Glass Stopper for Still Flask 24/40 is a specialized piece of laboratory equipment designed to seal a still flask (or other types of laboratory flasks) during distillation or other chemical processes. Here's a detailed breakdown of the description:

1. Material: Glass

• The stopper is made of glass, which is chemically inert, non-reactive, and able to withstand a variety of chemical processes, making it ideal for use in laboratories.
• Glass is also transparent, allowing for visual inspection of the contents within the flask without removing the stopper.

2. 24/40 Joint

• The 24/40 designation refers to the ground glass joint size of the stopper. Specifically, it indicates that the stopper has a 24 mm outer diameter and a 40 mm length for the ground joint.
• This type of joint is standardized in laboratory glassware, ensuring compatibility between the stopper and the flask or apparatus it is designed to fit.
• The ground joint means that the surfaces where the stopper and flask come together are ground smooth to create an airtight seal when the stopper is inserted into the flask's neck. This is especially important in processes where gases or vapors must be contained, such as during distillation.

3. Stopper Function

• The primary function of the glass stopper is to seal the still flask, preventing any contents from spilling or evaporating and maintaining an airtight environment.
• In a distillation setup, this is crucial as it helps maintain proper pressure and temperature conditions, while preventing contamination of the vapors.
• The stopper is often used during distillation or evaporation processes in chemical or pharmaceutical laboratories.

4. Design and Features

• The stopper has a flat, rounded shape, which allows it to sit securely in the flask’s neck.
• It may have a groove or flange around the edge to ensure a snug fit and ease of removal.
• It is designed to provide a secure and airtight seal, but can be easily removed or replaced if necessary.

5. Applications

• This glass stopper is used with laboratory glassware such as still flasks, round-bottom flasks, and other similar vessels, often in chemical, biological, or pharmaceutical laboratories.
• It is a key component in distillation systems, where it helps maintain the controlled environment needed to separate liquids based on their boiling points.

Summary:

A Glass Stopper for Still Flask 24/40 is a laboratory-grade stopper made of glass, designed to create an airtight seal for still flasks with a 24/40 ground glass joint size. It is essential for maintaining a controlled environment in distillation and other processes where secure sealing of the flask is required.