Morrison Discard Boxes (or containers) are heavy-duty, leak-proof stainless steel bins used inside laboratory autoclaves to safely hold and sterilize contaminated waste. They act as a critical safety barrier during “discard cycles” for items like used Petri dishes, gloves, culture tubes, and pipettes.
Core Purpose & Function
- Spill Containment: Plastic autoclave waste bags frequently split or melt under extreme heat. The solid, leak-proof bottom of a Morrison box catches these liquids, preventing biohazardous waste from ruining the autoclave’s heating elements or plugging the drain.
- Steam Penetration: While the base is completely solid to trap fluids, the upper or central walls are often perforated or open. This design allows hot, pressurized steam to circulate freely around and into the waste bags for complete sterilization.
- Safe Transport: Equipped with sturdy bucket-style handles or wire mesh carriers, they let lab personnel safely lift and transport hot or heavy biohazard loads out of the machine.
Common Specifications & Sizing
Morrison boxes are manufactured by top laboratory equipment brands to match specific autoclave footprints:
- LTE Scientific: Specifically tailors rectangular and square discard boxes for their Touchclave range, scaling from Size 1 up to Size 4.
- [Astell Scientific](https://www.camlab.co.uk/astell-morrison-discard-container-390dx500h mm-top-loading-models): Makes cylindrical, deep, and half-depth variations (e.g., 390 x times 500mm) ideal for top-loading autoclave models.
- Material: Built almost exclusively from high-grade 304 or 316 stainless steel to withstand repeated exposure to high temperatures 121°C to 134°C, corrosive chemicals, and steam.
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