Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 541, Diam. 42.5 mm, Whatman (CAT#: STEM-L-4441-LC)

The Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 541 manufactured by Whatman is ideal for rapid filtration of fiber in animal foodstuffs, gelatine in milk and cream, chloride in cement, and chloride and phosphorous in coal and coke. The Filter papers are acid hardened to obtain extremely low level of ash.

Material: Cellulose filters, circles
Packaging: Pack of 100
Parameter: 34 sec/100 mL speed (Herzberg), 7 psi wet burst
Diam.: 42.5 mm
Thickness: 155 μm
Ash: ≤0.006%
Pore size: 22 μm (Particle retention)
Basis weight: 82 g/m²

High wet strength
Chemical resistance
Tough surfaces
Fast filtration speed

Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 541, Diam. 90 mm, Whatman (CAT#: STEM-L-4442-LC)