1.Grade: BIO-4
2.Filtration Speed: Fast
3.Pore ​​sizes: 20-25μm
4.Disc: 50, 55, 70, 90, 110, 125, 150, 180, 185, 200, 220, 240, 250, 270, 300, 320, 350, 400, 450, 600mm or OEM

Availability: In Stock

Description of No. 4 Filter Paper:

HAWACH No. 4 filter paper is equivalent to Whatman Grade 4, with a pore size of 20μm. Ideal for rapid filtration of routine biological liquids and organic leachable clarification in analysis.

Features of  HAWACH No 4 filter paper:

  • Like No. 2 filter paper, there are many different sizes of filter paper: 20 micron filter paper, etc.
  • The particle retention capacity is basically the same as that of the No. 41 quantitative filter paper.
  • Filter paper No. 4 is designed for analytical and routine applications. Can be used for many different needs and applications.
  • Low ash content (less than 0.1%)
  • Variety of diameters, thicknesses, particle retention, and filtration rates
  • No 4 filter paper has an extremely fast filtration speed and can very well retain coarse particles and colloidal precipitates, such as ferric hydroxide and aluminum hydroxide.
  • HAWACH high-quality filter paper is available in a variety of diameters, thicknesses, and filtration rates, and can provide square filter paper and round filter paper according to your requirements.

Application:

  1. All sizes, like 20 micron filter paper with high-Velocity Air Pollution Monitoring
  2. Fast Filtration for Clarification of Conventional Biological Liquids and Organic Leachables
  3. Standard Analysis for Determination of Corn Syrup, Dairy Products, Disinfectant Spore Activity, 3-Cl-1, 2-C₃H₈O₂ in food, etc.
  4. Rapid Filtration: For routine purification of biological fluids or organic extracts during analysis
    Qualitative filter paper No. 4 (20µm particle retention) is available in a variety of sizes and formats.
  5. Ideal for fast filtration of biological or organic leachables in routine analysis. It can also be used in high-flow air pollution monitoring where fine particle retention is not required. It is also a standard analytical filter paper for the determination of corn syrup, dairy products, disinfectant spore activity, 3-Cl-1, 2-C₃H₈O₂ in food, etc.

Selection Guide for Filter Paper

filter paper selection

Grade Comparison

HawachWhatmanAdvantecMunktellAhlstromMacherey NagelSartorius
BIO-4Grade 411288/36311670604

Technical Data

GradeParticle
Retention
Product
Appearance
Filtration
Speed
Ash Content
(%)
Basis Weight
(g/m2)
Wet Burst
(mm H2O)
BIO-420μm- 25μmSmoothFast<0.184> 120

Ordering Information

Item #DescriptionNo.pore sizeflow ratediameterpack
BIO-4-050Qualitative Filter PaperGrade 420μm-25μmFast50mm100pcs/pk
BIO-4-05555mm
BIO-4-07070mm
BIO-4-09090mm
BIO-4-110110mm
BIO-4-125125mm
BIO-4-150150mm
BIO-4-180180mm
BIO-4-185185mm
BIO-4-200200mm
BIO-4-220220mm
BIO-4-240240mm
BIO-4-250250mm
BIO-4-270270mm
BIO-4-300300mm
BIO-4-320320mm
BIO-4-350350mm
BIO-4-400400mm
BIO-4-450450mm
BIO-4-600600mm

Certificates

Certificates

CONTACT FORM