Filter Paper, round, folded, Grade 1573 ½, 125 mm, wet-strengthened, 100 pc/PAK

Properties:

• Fast filtration
• Filtration speed of 25 s/100 ml

A paper with a high filtration speed and high wet strength. With a very smooth surface for easier scraping or washing off of the precipitate.
Resistant to sulphuric and nitric acid solutions (up to 40% at 50 °C), hydrochloric acid solutions (up to 10% at 100 °C, 20% at 60 °C, 25% at 20 °C) and alkaline solutions (up to 10% at 20 °C).
Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses. Decreased overall filtration time because of the extra surface area exposed; the normal slow down of filtration speed due to the loading of particulate is postponed. Increased total loading capacity as more filter area is available. Maintained flow rate due to the reduction in filter paper contact with funnel side and the self-supporting shape of the filter itself. The prepleating does not significantly affect any of the technical data, and the same figures may be used for the flat circles. Time-saving Whatman qualitative grades are offered in this convenient form, which gives major advantages over flat circles. A medium fast filter paper with high wet strength. This paper has the same chemical resistance characteristics as Grade 1573. Also available in flat stock form as Grade 1574. Grade 1573 ½: 12-25 µm

Here you can find the certificate: https://www.cytivalifesciences.com/en/de/support/quality/ certificates