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Whatman Quantitative Filter Papers, Hardened Low Ash Grades, Grade 50, GE Healthcare


1450-185 1450-125 1450-320 1450-110 1450-993 1450-916 1450-150 1450-240 1450-917 1450-150 1450-125 1450-320 1450-055 1450-500 1450-917 1450-070 1450-042 1450-185 1450-042 1450-240 1450-090 1450-993 1450-110 1450-916 1450-500
28485-143 28485-100 10035-274 CA28485-085 CA70240-144 CA11013-358 CA28485-121 CA28485-165 CA11013-760 28485-121 CA28485-100 CA11013-356 28485-020 CA11013-644 10035-280 28485-041 CA28485-019 CA28485-143 28485-019 28485-165 28485-063 70240-144 28485-085 10035-278 10035-276
Whatman Quantitative Filter Papers, Hardened Low Ash Grades, Grade 50, GE Healthcare
Filters Filter Paper Quantitative Filter Paper
GE’s thinnest Whatman brand hardened filter paper, highly glazed Grade 50 supports vacuum filtration in Büchner funnels or Hirsch funnels and enables strong retention of very fine crystalline precipitates.

  • Thinner filter design (average thickness 115 µm) than most Büchner filter papers
  • Acid-treated for high wet-strength and chemical resistance
  • 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)
  • Compatible with Hirsch or Büchner funnels

GE offers three grades of hardened low ash filters

For many vacuum filtration applications, a thin filter paper with a slow flow rate and excellent wet strength can maintain sample quality and purity. Because Grade 50 thin filter papers are hardened to minimize fiber shredding, they are a good choice for use as carriers in integrated circuits.

Wet-strengthened filters for vacuum filtration. Grade 50 thin filter paper from GE Healthcare’s Life Sciences business is very strong when wet. It will withstand wet handling and precipitate removal by scraping.

All three are designed for use in Hirsch and Büchner funnel applications and can be customized for an exact fit.




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Prices shown are current at time of publication. Where changes have occurred, prices prevailing at the time of shipment will apply. Prices are subject to change without notice.

Our sales and customer service departments welcome quotations for laboratory set-ups and multiple-unit orders. Your inquiries are welcome and appreciated.

Payment Terms:
Payment terms are Net 30 Days on approved credit, F.O.B. warehouse or point of manufacture. Shipping charges are prepaid and added to the invoice. C.O.D. orders will be charged a $10.00 handling fee plus shipping charges. AMEX, MasterCard, and Visa are accepted.

Minimum Order:
There is no minimum order at BioExpress. Full case quantities or minimum quantities may apply to non-stock or specialty items.

All orders are shipped F.O.B. warehouse or point of manufacture. Shipping charges are prepaid and added to the invoice. Orders are usually shipped within 24 hours of receipt. We ship by the most efficient and economical means available. Extra charges apply to HAZMAT and dry ice shipments.

If you would like to return an item, please call BioExpress customer service or contact your local representative for an RGA number. All returns must include an RGA number, include original packaging and be shipped prepaid. Items older than 30 days, sterile, or special order items are subject to review. A 15% restocking fee applies.

BioExpress accepts no responsibility and shall not be held liable for loss, damage, expense, consequential, or accidental damage. This includes the damage to property, person, or premises resulting from these products. BioExpress MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURCHASE. BioExpress expressly disclaims all other warranties, whether express, implied or statutory, including the warranty of MERCHANTABILITY AND FITNESS FOR USE. In no event will BioExpress be liable for consequential damages arising from the use of products described in this catalog.

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