Filter Papers, round, grade 42, 150 mm, 100/pak

Whatman Grade 42 filter paper is equivalent to Munktell 393-Properties:-Slow filtration-Filtration speed of 1870 s/100 ml-A world standard for critical gravimetric analysis with the finest particle retention-of all Whatman cellulose filter papers. Typical analytical precipitates include barium-sulfate, metastannic acid, and finely precipitated calcium carbonate.

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