Whatman® Qualitative Filter Paper, Grade 4, 70 mm Circles
For laboratory, institutional, and professional use only. Not available for residential or personal purchase. Orders are subject to verification.
Whatman® Grade 4 Qualitative Filter Paper is a fast-flow cellulose filter designed for routine laboratory filtration applications where rapid flow rate is required. With a particle retention range of 20–25 µm, this grade is ideal for filtering coarse precipitates, gelatinous materials, and large particulate matter.
Grade 4 filter paper is commonly used in qualitative analytical procedures, sample preparation, and routine laboratory separations. Its high flow rate makes it particularly useful for filtering biological fluids, organic extracts, and environmental samples during analytical workflows.
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