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Whatman Grade 4 Qualitative Filter Papers, GE Healthcare


1004-070 1004-090 1004-917 1004-648 1004-930 1004-027 1004-400 1004-125 1004-047 1004-320 1004-055 1004-110 1004-042 1004-185 1004-240 1004-150 1004-270 1004-050
These cellulose filters are used in qualitative analytical techniques to determine and identify materials

Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Note: This data shown may be based on historic Whatman records. As is normal practice, customers should determine and validate for themselves (as necessary) that the products are suitable for their specific application.

Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters. Cellulose material (98% alpha cellulose content min.)



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Description Dimensions Supplier No. Catalog Number Unit List Price Quantity
Grade 4 Qualitative Filter Paper Standard Grade, circle, 55 mm 55 mm dia. 1004-055 28460-030 Pack of 100 Retrieving


Thickness 205 µm (typical)
Particle Retention 25 µm (Particle retention rating at 98% efficiency.), in liquid max.
Filtration Speed Approx. 37 s (Herzberg)
Ash Content 0.06% (Ash is determined by ignition of the cellulose filter at 900°C in air)
Airflow Rate 3.7 s/100 ml/in²
Tensile Strength 28.4 N/15 mm, Tensile M/D Dry
Basis Weight 96 g/m²
Flow Rate Very fast
Burst Strength 0.048 bar, wet burst; 0.689 bar, dry burst
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