Whatman 1825-025 Filter Circles, 25mm Dia, Binder Free Grade GF/F, 100/pk (PN:1825-025)

“Binder-free Grade GF/F” refers to borosilicate glass microfiber filters without added binders, offering high purity, strong chemical compatibility, and minimal extractables — ideal for sensitive lab work where contamination must be minimized.

These 25 mm filter circles have a 0.7 µm nominal retention rating, meaning they capture particles larger than ~0.7 microns while allowing liquids to pass through efficiently for clear filtrate.

These filters are widely used for DNA binding and purification, protein clarification, challenging biochemical solution filtration, and landfill leachate toxicity tests, as well as other general laboratory clarification tasks.

Yes — because they’re made from borosilicate glass microfiber, these filters can withstand elevated temperatures (typically up to ~500 °C), making them suitable for air filtration and gravimetric analysis involving ignition.

No — these GF/F filter circles are non-sterile when supplied, so if your application requires sterility (e.g., microbiological work), you should sterilize them using appropriate lab techniques before use.