Plastic Pipettes

Disposable Pasteur pipettes are ideal for general liquid transfer, adding reagents, and any application where cross-contamination between samples is a concern. Reusable calibrated single-channel pipettes are the right choice for precise, repeatable volume delivery in molecular biology and diagnostic work where accuracy and reproducibility matter.

Non-sterile bulk-pack Pasteur pipettes are suitable for chemistry and general lab use where biological sterility is not required. Individually EO-sterile packs must be used for cell culture, microbiology, and diagnostic applications where the pipette contacts a sterile field. Opening individually packaged pipettes aseptically preserves sterility.

Standard 3 ml Pasteur pipettes cover most droplet and transfer applications. Calibrated single-channel pipettes are available in overlapping ranges from 0.5 ml to 50 ml. Always choose a pipette where the required volume falls within 20% to 100% of the pipette's maximum volume for the best accuracy.

LDPE Pasteur pipettes resist most aqueous solutions and dilute acids and bases but are not suitable for concentrated organic solvents such as acetone, toluene, or chloroform. For organic solvents, use a glass Pasteur pipette or a PP pipette if compatible. Calibrated pipette shafts are typically polycarbonate or acrylic; check compatibility before use with aggressive chemicals.

A Pasteur (transfer) pipette is an ungraduated disposable LDPE tube used to transfer approximate volumes by squeezing. A calibrated single-channel pipette is a precision adjustable instrument that dispenses an exact set volume, typically from 0.5 microlitres to 50 ml, with accuracy better than plus or minus 1%. Use Pasteur pipettes for transfer and droplet addition; use calibrated pipettes where volume accuracy is critical.

Not automatically. Non-sterile bulk-pack disposable Pasteur pipettes are manufactured and packaged without sterilisation and are suitable for general chemistry and non-sterile biology work. Individually EO-sterile packs have been sterilised with ethylene oxide and are appropriate for cell culture, microbiology, and diagnostic applications. Always check the packaging label for sterility status before use.

LDPE Pasteur pipettes have a built-in squeezable bulb as part of the one-piece moulded body. Squeeze the bulb before inserting the tip into the liquid, then release the squeeze to draw liquid up into the tip. Squeeze again gently to dispense the liquid. The amount drawn up depends on how far you release the squeeze. These pipettes do not require a separate rubber bulb.

LDPE Pasteur pipettes are not suitable for chlorinated solvents (chloroform, DCM), aromatic hydrocarbons (toluene, xylene), concentrated ketones (acetone), or esters. These solvents dissolve or swell LDPE and can contaminate the sample. For organic solvents, use glass Pasteur pipettes or check whether a PP alternative is compatible with your specific solvent.

EO sterile means the item has been sterilised using ethylene oxide gas, a method that penetrates packaging and kills all viable microorganisms without heat damage. This is the standard sterilisation method for disposable plastic labware that cannot withstand autoclave temperatures. EO-sterile pipettes are essential for cell culture, blood sample handling, and microbiological work where introducing live organisms would invalidate the experiment or test.