Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 52, Diam. 90 mm, Whatman (CAT#: STEM-L-4407-LC)

The Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 52 manufactured by Whatman is ideal for Büchner filtrations where requiring recovery of the precipitate from the surface of filter after filtration. The wet strength and chemical resistance are same with the acid hardened ashless Filter papers.

Material: Cotton filters, circles
Packaging: Pack of 100
Parameter: 235 sec/100 mL speed (Herzberg), 7 psi wet burst
Diam.: 70 mm
Thickness: 175 μm
Ash: ≤0.015%
Pore size: 7 μm (Particle retention)
Basis weight: 101 g/m²

Very hard surface
Medium retention rate and flow rate

Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 52, Diam. 240 mm, Whatman (CAT#: STEM-L-4408-LC)