Whatman chromatography papers are widely used across the world, reflecting their purity, high quality and consistency. They are made from specially selected cotton cellulose and rigorously quality controlled to ensure uniformity within the grade.

• Pure cellulose produced from the highest quality cotton linters, with no additives, ensures that no contamination will occur during the transfer steps
• Manufactured and tested specifically for chromatographic techniques to ensure the wicking capability and uniformity of capillary action that is important in obtaining clean and even transfers during blotting

Grade 1 Chr have smooth surface with a linear flow rate. Good resolution for general analytical separations.

Grade 2 Chr filters are slower than 1 Chr for higher resolution applications. Smooth surface. Particularly recommended for optical or radiometric scanning.

Grade 3 Chr filters are used for general applications with medium/heavy solute loadings. Frequently used for separation of inorganic compounds and for electrophoresis.

Grade 3MM Chr is also used both in electrophoresis and for general chemistry. A medium thickness paper used extensively for general chromatography and electrophoresis.

Grade 4 Chr filters are the fastest of the thin papers. Recommended for routine and/or repetitive chromatography when loadings are relatively low. Smooth surface. Very suitable where speed is important and very high resolution is not required.