Whatman 1440-125

Whatman Filter paper grade 40 Grade 40 Quantitative Filter Paper Ashless ( Ash 0.007% ) , circle, 125 mm Complete Packsize 400 Pieces Grade Grade 40 Format Circles Type Ashless Typical Thickness 210 µ m Basis Weight 95 g/ m2 Filtration Speed ( Herzberg) 340 s Air Flow Rate 19.3 s/ 100 mL/ in2 Ash Content 0.007% 1) Tensile M/ D Dry 46.7 N/ 15 mm Material High-quality cotton linters Alpha Cellulose Content Min. 0.98 1) Ash is determined by ignition of the cellulose filter at 900° C in air. cat no : 1440-125