Quantitative Filter Paper, 70 mm dia, Cotton Linters, Grade 54

Cytiva's Whatman™ Grade 54 filter paper has high wet strength and a larger nominal particle retention rating than comparable Buchner filtration papers, enabling fast vacuum filtration of coarse precipitates. Whatman™ Grade 54 filter paper can sustain fast vacuum or suction filtration in a Buchner or Hirsch funnel. The hard, smooth, acid-treated Grade 54 fast filter paper supports collection of coarse and gelatinous precipitates with minimal fiber shredding, even when wet.

Diameter	:	70 mm
Grade	:	Grade 54
Material	:	High-quality Cotton Linters
Ash Content	:	0.005%
Sterility	:	Non-sterile
Grade Type	:	Hardened Low Ash
Type	:	Quantitative
Dry Burst Pressure	:	131 kPa/19 psi
Filtration Speed	:	39 sec/100 ml (Herzberg)
Format	:	Circle
Nominal Air Flow Rate	:	3 sec/100 ml/in2
Nominal Basis Weight	:	90 g/m2
Particle Retention in Liquid	:	22 µm
Properties	:	Very Fast
Thickness	:	185 µm
Typical Water Flow Rate	:	453 ml/min
Wet Burst Pressure	:	48.3 kPa/7 psi
Alpha Cellulose Content	:	=98%
Loading Capacity	:	N

For quantitative analysisAcid-treated for high wet-strength and chemical resistanceLarge nominal particle retention rating of 22 µmFast filtration speed (Herzberg filtration speed 39 s)High purity (0.015% ash maximum)Compatible with Buchner funnel or Hirsch funnel applicationsSuitable for Buchner filtrations where it is desirable to recover the precipitate from the filter surface after filtration, high wet strength makes this grade very suitable for vacuum assisted fast filtration of 'difficult' coarse or gelatinous precipitates