Cole-Parmer® Ashless Filter Papers

Perfect for gravimetric analysis or sample preparation
  • High-purity, acid-washed filters with high wet strength
Grade 94 filters are fine retention filters for analysis of fine particles such as barium sulfates, lead sulfates, stannic or nickel sulfide, calcium oxalate, and calcium fluoride. Grade 74 filters are well-suited for general filtration such as analysis of clay, copper, bismuth, silicon, and iron. Grade 54 filters are ideal for filtration of coarse or gelatinous precipitate, namely iron, zirconium, or aluminum hydroxides, and cobalt sulfide. Sold 100/pk.
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24 variations of this product are available.

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Diameter (mm) Pore Size (micron) Description
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240 10 Grade 54
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185 1.5 Grade 94
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150 10 Grade 54
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150 2 Grade 74
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90 10 Grade 54
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110 1.5 Grade 94
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125 10 Grade 54
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110 10 Grade 54
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125 1.5 Grade 94
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90 2 Grade 74
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125 2 Grade 74
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90 1.5 Grade 94
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110 2 Grade 74
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185 2 Grade 74
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42.5 1.5 Grade 94
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42.5 2 Grade 74
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240 2 Grade 74
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55 2 Grade 74
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42.5 10 Grade 54
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240 1.5 Grade 94
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