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.
All sizes, like 20 micron filter paper with high-Velocity Air Pollution Monitoring
Fast Filtration for Clarification of Conventional Biological Liquids and Organic Leachables
Standard Analysis for Determination of Corn Syrup, Dairy Products, Disinfectant Spore Activity, 3-Cl-1, 2-C₃H₈O₂ in food, etc.
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.
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.