Laboratory Glass Pasteur Pipettes

Key Features and Use Cases

• Unglazed: These pipettes are not calibrated for a specific, precise volume, but are used for approximate transfers of small amounts of liquid (typically around 1ml to 3ml).
• Material: They are usually made of either soda-lime glass (cheaper, good for general use) or borosilicate glass (more chemical and thermal resistant, less brittle).
• Design: The pipettes are long and slender with a tapered, fire-polished tip that allows for a controlled drop size and precise delivery.
• Plugging Option: Many glass Pasteur pipettes feature a constriction near the top to facilitate the insertion of a cotton plug, which helps prevent contamination.
• Reusability (with caution): Unlike disposable plastic Pasteur pipettes, glass variants can be sterilized and reused, providing a more Eco-friendly option for certain lab workflows.
• Common Applications: They are fundamental tools in various lab operations, including chemistry, biology, and biochemistry, for tasks such as:
  • Transferring reagents
  • Diluting samples
  • Inoculating cultures
  • Aspirating supernatants during centrifugation