Filter Paper, Ahlstrom,
Product number: 446-300-40Ahlstrom | Ahlstrom Grade No. 631 (Smooth)
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a Brand: Ahlstrom Filtration LLC
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Medium flow rate and retention. Strong general purpose filter, useful in Buchner funnels, for barium carbonate, lead chromate, beryllium hydroxide. Commonly used in student labs. Particle retention 10 µm. Equivalent to Whatman #4.
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