No. 4 Filter Paper

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.

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