Filter Paper, round, Grade 542, 55 mm, 100 pc/PAK

These filters are acid cured to give high wet strength and chemical resistance with extremely low ash content. The hard surface makes these filters suitable for a variety of critical filtration processes. The general purpose ashless filter paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acids and alkalis. Commonly used in gravimetric analysis of metals in acidic/alkaline solutions and in collecting hydroxides after precipitation by strong alkalis. High retention of fine particles under demanding conditions. Slow flow rate. Very hard and strong with excellent chemical resistance. Commonly used in gravimetric metal determinations. Grade 542: 2.7 μm
Properties: Slow filtering, filtration speed of 2510 s/100 ml, hardened, ashless

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