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Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Hardened low ash filter paper, highly glazed for recrystallization of very fine precipitates using Büchner funnel or Hirsch funnel filtration.

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ID	Product Name
28418082	Grade 50 Filter for Quantitative Analysis, Thin, 110 mm circle (100 pcs)
28418083	Grade 50 Filter for Quantitative Analysis, Thin, 125 mm circle (100 pcs)
28418084	Grade 50 Filter for Quantitative Analysis, Thin, 150 mm circle (100 pcs)
28418085	Grade 50 Filter for Quantitative Analysis, Thin, 185 mm circle (100 pcs)
28418087	Grade 50 Filter for Quantitative Analysis, Thin, 240 mm circle (100 pcs)
28418088	Grade 50 Filter for Quantitative Analysis, Thin, 320 mm circle (100 pcs)
28418077	Grade 50 Filter for Quantitative Analysis, Thin, 42.5 mm circle (100 pcs)
28418096	Grade 50 Filter for Quantitative Analysis, Thin, 460 × 570 mm sheet (100 pcs)
28418090	Grade 50 Filter for Quantitative Analysis, Thin, 500 mm circle (100 pcs)
28418078	Grade 50 Filter for Quantitative Analysis, Thin, 55 mm circle (100 pcs)
28418079	Grade 50 Filter for Quantitative Analysis, Thin, 70 mm circle (100 pcs)
28418080	Grade 50 Filter for Quantitative Analysis, Thin, 90 mm circle (100 pcs)
28418098	Grade 50 Filter for Quantitative Analysis, Thin, White Smear Tab Sheet (100 pcs)
28418095	Grade 50 Quantitative Filter Paper Hardened Low Ash, sheet, 150 × 230 mm

Whatman Grade 50 quantitative hardened low ash filter paper is highly glazed to enable recrystallization of very fine precipitates using Büchner funnel or Hirsch funnel filtration.

This hard, very thin, high wet-strength Grade 50 quantitative filter paper withstands wet handling and precipitate removal by scraping. With very minimal fiber shedding, they are an especially good choice for use as carriers in integrated circuits.

Thinner filter design (average thickness 115 µm) than most Büchner filter papers
Nominal particle retention of 2.7 µm
Slow flow rates (Herzberg filtration speed 2685 s)
High purity and low ash content (0.015% ash maximum)
Acid-treated for high wet-strength and chemical resistance
Hardened to minimize fiber shredding

Whatman low ash hardened filter paper for quantitative analysis is available in three grades. All three are designed for use in gravity and vacuum suction filtration in Buchner and Hirsch funnels. Grade 50 is also available in Smear Tab format for wipe testing, such as surface testing for radionuclide contamination.

All Whatman low ash hardened filter papers can be customized for an exact fit.

Looking for a filter paper, membrane filter, or syringe filter? Let Cytiva help you find the optimal filter for your needs to ensure reliable analysis.

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Product	Product Name	Dimensions All Ø 42.5 mm Ø 55 mm 150 x 230 mm Ø 125 mm Ø 150 mm Ø 185 mm Ø 320 mm Ø 90 mm 460 x 570 mm Ø 70 mm N/A Ø 240 mm Ø 500 mm Ø 110 mm Ø 63.5 mm	Price
1450-042	Grade 50 Filter for Quantitative Analysis, Thin, 42.5 mm circle (100 pcs)	Ø 42.5 mm	21.93 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-055	Grade 50 Filter for Quantitative Analysis, Thin, 55 mm circle (100 pcs)	Ø 55 mm	25.82 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-063	Grade 50 Filter for Quantitative Analysis, Thin, 63.5 mm circle (100 pcs)	Ø 63.5 mm	28.00 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-070	Grade 50 Filter for Quantitative Analysis, Thin, 70 mm circle (100 pcs)	Ø 70 mm	29.65 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-090	Grade 50 Filter for Quantitative Analysis, Thin, 90 mm circle (100 pcs)	Ø 90 mm	38.76 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-110	Grade 50 Filter for Quantitative Analysis, Thin, 110 mm circle (100 pcs)	Ø 110 mm	50.37 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-125	Grade 50 Filter for Quantitative Analysis, Thin, 125 mm circle (100 pcs)	Ø 125 mm	58.09 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-150	Grade 50 Filter for Quantitative Analysis, Thin, 150 mm circle (100 pcs)	Ø 150 mm	68.42 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-185	Grade 50 Filter for Quantitative Analysis, Thin, 185 mm circle (100 pcs)	Ø 185 mm	85.10 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-240	Grade 50 Filter for Quantitative Analysis, Thin, 240 mm circle (100 pcs)	Ø 240 mm	150.80 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-320	Grade 50 Filter for Quantitative Analysis, Thin, 320 mm circle (100 pcs)	Ø 320 mm	274.00 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-500	Grade 50 Filter for Quantitative Analysis, Thin, 500 mm circle (100 pcs)	Ø 500 mm	555.00 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-916	Grade 50 Quantitative Filter Paper Hardened Low Ash, sheet, 150 × 230 mm	150 x 230 mm	168.23 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-917	Grade 50 Filter for Quantitative Analysis, Thin, 460 × 570 mm sheet (100 pcs)	460 x 570 mm	459.00 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1450-993	Grade 50 Filter for Quantitative Analysis, Thin, White Smear Tab Sheet (100 pcs)	N/A	25.82 USD	Add to cart Get Quote In Stock Stock on request Limited stock

Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Slow filtration for strong retention of very fine particles

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Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Slow filtration for strong retention of very fine particles

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