Whatman 1450-993 Quantitative, Hardened Low Ash High-quality cotton linters Filter Paper 2.7 µm, 46 mm (100/Pack)

This Whatman,1450-993, Grade 50 filter paper has a diameter of 46 mm and comes in a pack of 100.

Grade 50: Retention of finest crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface. This finish also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Büchner or 3-piece filter funnels. Very strong when wet. 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.

Cytiva'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.

Features:
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