Whatman 1442090 Grade 42 Quantitative Filter Paper, Ash less, 0.007%, circle, 90 mm (Pack of 100)

Diameter: 9.0cm Retention: 2.5µm A world standard for critical gravimetric analysis A Whatman cellulose filter is manufactured from high quality cotton linters treated to achieve a minimum alpha cellulose content of 98% Typical analytical precipitates include barium sulphate, metastannic acid and finely precipitated calcium carbonate