What material is a pasteur pipette typically made from?

A Pasteur pipette is typically made from glass, which is an important characteristic of this type of laboratory tool. Glass provides several advantages, including chemical inertness, which prevents reactions with the liquids being measured, and optical clarity, allowing for better visibility of the liquid inside. This makes glass Pasteur pipettes particularly suitable for use in various laboratory procedures, including transferring small volumes of liquids, performing chemical reactions, and working with sensitive biological samples.

While plastic pipettes do exist and are used in many applications due to their disposable nature and lower cost, traditional Pasteur pipettes are distinctively made of glass. Metal is not used because it is not suitable for this application due to potential reactions with chemicals and its inability to work well for precise liquid transfer. Rubber is not used for construction but may be found in some designs as a bulb for drawing liquid into the pipette. Overall, the glass material contributes to the effectiveness and reliability of Pasteur pipettes in scientific practices.