Filter paper, Grade 4, Whatman , Dia. 150 mm

Filter paper, Grade number 4

The qualitative filter papers are made of refined pulp and linters with more than 95% alpha-cellulose content. The ash content of these filter papers is approx. <0.1%. They are essentially used for qualitative analyses.

Two categories of qualitative filter papers are offered: standard strength and with increased wet strength especially suitable for vacuum filtration or pressure filtration. They are available in different formats -rolls, sheets, discs, and folded filters.
Circles. Qualitative. Fast flowrate. Excellent retention of coarse and gelatinous precipitants. Creped. Supplied in packs of circles as outlined below.
Flowrate:
Retention:
Wet strength:
Thickness:
Ash: Fast
Medium
Low
0.21mm
0.06%
Dia. 150 mm