Qualitative Filter Paper
Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter papers are used for straining with good retention and flow rates. These cellulose filters create a semi-permeable barrier perpendicular to a liquid or airflow in order to separate fine substances from liquids or air. Different grades of filter paper are available for performing various laboratory applications including routine lab work, ranging from coarse to fine filtration of particulates. Avantor offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
VWR® Qualitative Filter Paper, Grade 413
Supplier: VWR International
Suitable for filtration of aluminum phosphate, barium carbonate, lead chromate, and more.
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VWR® Glass Fiber Filter Papers, Binder-Free, Fast Flow, High Loading Capacity
Supplier: VWR International
VWR® filter papers are high-performance cellulose-based filtration materials designed for accurate and reproducible separations in laboratory settings. Available in both qualitative and quantitative grades, these papers deliver consistent retention, flow rate, and purity across a wide range of scientific applications. Whether used in gravimetric analysis, sample cleanup, or routine laboratory workflows, VWR® filter papers provide the reliability and technical precision demanded by today's researchers.
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Whatman™ Grade 595 ½ Qualitative Filter Papers, Whatman products (Cytiva)
Supplier: Cytiva
A prepleated filter used for many routine analytical applications in different industries (e.g., particle separation from food extracts or filtration of solids from digested environmental samples, e.g., for ICP/AAS analysis).
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Whatman™ Grade 1574 and 1574 ½ Qualitative Filter Papers, Wet Strengthened Grades, Whatman products (Cytiva)
Supplier: Cytiva
Medium fast cellulose filter paper with high wet strength. This paper has the same chemical resistance characteristics as Grade 1573.
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Whatman™ Grade 602 h Qualitative Filter Papers, Whatman products (Cytiva)
Supplier: Cytiva
A standard grade filter esed in sample preparation, e.g., in the beverage industry for residual sugar determination, acidic spectra, refractometric analysis, and HPLC.
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LabExact® CFP4 Qualitative Cellulose Filter Papers, 25 µm
Supplier: I.W. TREMONT CO., INC.
The fastest flow rate demonstrated by any of the qualitative cellulose filter medias, resulting in a low retention rate of approximately 25 µm.
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LabExact® CFP2 Qualitative Cellulose Filter Papers, 8 µm
Supplier: I.W. TREMONT CO., INC.
A more retentive and absorbent media than CFP1, with approximately 8 µm and a medium to slow flow rate.
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LabExact® CFP3 Qualitative Cellulose Filter Papers, 6 µm
Supplier: I.W. TREMONT CO., INC.
Virtually identical to CFP1, but twice as thick, resulting in a significantly slower flow rate with a retention of approximately 6 µm.
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LabExact® CFP1 Qualitative Cellulose Filter Papers, 11 µm
Supplier: I.W. TREMONT CO., INC.
Very widely used filter media demonstrating retention of approximately 11 µm and medium flow rate.
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LabExact® CFP5 Qualitative Cellulose Filter Papers, 2.5 µm
Supplier: I.W. TREMONT CO., INC.
Filtration of very fine particulate and clarification with applications in environmental sciences and chemical analysis.
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LabExact® CFP6 Qualitative Cellulose Filter Papers, 3 to 4 µm
Supplier: I.W. TREMONT CO., INC.
Very similar basis and thickness to CFP5, but with a slightly less retentive porosity.
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Whatman™ Grade 1 Qualitative Filter Paper, Whatman products (Cytiva)
Supplier: Cytiva
Whatman Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.
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Whatman™ Grade 597 and 597 ¹/₂ Qualitative Filter Papers
Supplier: Cytiva
Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses.
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Whatman™ Grade 4 Qualitative Filter Papers, Whatman products (Cytiva)
Supplier: Cytiva
Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical.
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Whatman™ Grade 602 h ½ Qualitative Filter Papers, Whatman products (Cytiva)
Supplier: Cytiva
A dense prepleated filter paper for collecting very small particles and removing fine precipitates.
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Whatman™ Grade 802 Qualitative Filter Papers, Whatman products (Cytiva)
Supplier: Cytiva
A prepleated filter for use with a conical filter funnel, offers fast filtration and high loading capacity for analysis involving coarse particles or gelatinous precipitates.
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