• USA Home
  • Z240591 - Whatman® qualitative filter paper, Grade 4

Z240591 Aldrich

Whatman® qualitative filter paper, Grade 4

circles, diam. 240 mm, pack of 100

Synonym: Whatman filter, Whatman filters, Whatman paper, filter paper, filter papers, paper filter



Related Categories Filtration Supplies, Labware, Manufacturer Browser, Paper Filters, Qualitative,
material   cellulose filters
packaging   pack of 100
mfr. no.   Whatman Article No., 28414017 (US reference)
  Whatman, 1004-240
limit   0.22 psi wet burst
  37 sec/100 mL speed (Herzberg)
diam.   240 mm
thickness   205 μm
ash   ≤0.06%
pore size   20-25 μm (Particle retention)
basis weight   92 g/m2


General description

These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Grade 4: 20-25 μm, (very fast filter paper)

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.

Other Notes

Global SIAL customers (excluding Japan) can now order any product from the GE Healthcare Life Sciences consumables portfolio (prepack only) using GE′s product numbering system.

The legacy GE Whatman products that use the SIAL "Z" product numbering system will be discontinued and directly replaced with a product number using a "WHA" prefix plus the GE product code. For reference, the legacy "Z" product number is identified as a synonym on the "WHA" product number listing.

This product has been replaced by WHA1004240-ALDRICH | Whatman qualitative filter paper, Grade 4, circles, diam. 240 mm, pack of 100

Legal Information

Whatman is a registered trademark of GE Healthcare

Price and Availability

Sterifil Aseptic System and Holder
Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.


Certificate of Analysis

Protocols & Articles
Related Products

replaced by

Product #


Add to Cart

WHA1004240 Whatman® qualitative filter paper, Grade 4, circles, diam. 240 mm, pack of 100

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?