Whatman® Grade 50, Hardened Low-Ash Filter Paper

Whatman® Grade 50 filter papers are used for the retention of very fine crystalline precipitates. It is the thinnest of all Whatman filter papers with a slow flow rate, these filters have a hardened and highly glazed surface, which also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Buchner or 3-piece filter funnels. Very strong when wet and will withstand wet handling and precipitate removal by scraping. In the electronics industry, the virtual absence of fiber shedding is utilized in carriers for integrated circuits.

Whatman® Grade 50 filter papers have a particle filtration size of 2.7 μm.

This grade is also available in Smear Tab format for wipe testing (e.g. testing of surfaces for radionuclide contamination).

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WHA1450055 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 55 mm, pack of 100
WHA1450070 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 70 mm, pack of 100
WHA1450090 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 90 mm, pack of 100
WHA1450110 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 110 mm, pack of 100
WHA1450125 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 125 mm, pack of 100
WHA1450150 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 150 mm, pack of 100
WHA1450185 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 185 mm, pack of 100
WHA1450240 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 240 mm, pack of 100
WHA1450993 Whatman® quantitative filter paper, hardened low-ash, Grade 50 white smear tab, pack of 100
WHA1450320 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 320 mm, pack of 100
WHA1450042 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 42.5 mm, pack of 100
WHA1450500 Whatman® quantitative filter paper, hardened low-ash, Grade 50 circles, diam. 500 mm, pack of 100
WHA1450917 Whatman® quantitative filter paper, hardened low-ash, Grade 50 sheets, L × W 460 mm × 570 mm, pack of 100
WHA1450916 Whatman® quantitative filter paper, hardened low-ash, Grade 50 sheets, L × W 150 mm × 230 mm, pack of 100