Description
Specifications Table
Product Name – Whatman Grade 40 Cellulose Filter Paper
Quantity/Pack Size – 1.27CM (Pack of 400), 3.2CM (Pack of 100), 4.25CM (Pack of 100), 4.7CM (Pack of 100), 5.5CM (Pack of 100), 7CM (Pack of 100), 9CM (Pack of 100), 11CM (Pack of 100), 12.5CM (Pack of 100), 15CM (Pack of 100), 18.5CM (Pack of 100), 24CM (Pack of 100), 32CM (Pack of 100), 3CM (Pack of 100), 45CM (Pack of 100), 46x57CM (Pack of 100)
Form – Circular discs
Grade – 40
Application – General lab filtration, qualitative analysis, particle retention
Product Overview
Whatman Grade 40 cellulose filter paper is a versatile, medium-speed filtration medium designed for general laboratory applications requiring reliable particle retention. Engineered with 100% pure cellulose, this filter paper ensures high purity and chemical compatibility, making it ideal for qualitative analysis and routine filtration tasks. The 8?m particle retention capability balances flow rate and efficiency, allowing for clear filtrates without sacrificing speed. Its uniform thickness and consistent porosity provide reproducible results, while the acid-washed treatment minimizes extractables, ensuring minimal interference in sensitive applications. The filter paper is compatible with a wide range of solvents and aqueous solutions, maintaining structural integrity even under moderate pressure. Available in multiple diameters, it adapts to various funnel sizes and filtration setups, from small-scale experiments to larger volume processing. The medium flow rate makes it particularly suitable for applications where moderate filtration speed is desired without compromising clarity. As a standard in many laboratories, Whatman Grade 40 offers a cost-effective solution for everyday filtration needs while maintaining the quality expected from a trusted brand in scientific supplies.
FAQs
1. What is the particle retention size of Whatman Grade 40 filter paper?
The particle retention size for Whatman Grade 40 filter paper is 8 micrometers, making it suitable for general filtration tasks.
2. Can this filter paper be used with organic solvents?
Yes, Whatman Grade 40 is compatible with many organic solvents, though compatibility should be verified for specific chemicals.
3. How does the flow rate compare to other Whatman grades?
Grade 40 offers a medium flow rate, faster than Grade 41 but slower than Grade 1, balancing speed and particle retention.
4. What is the material composition of this filter paper?
It is made from 100% pure cellulose fibers, acid-washed to ensure high purity and low extractables.
5. Is this filter paper suitable for vacuum filtration?
Yes, it can be used for vacuum filtration, though the maximum pressure should not exceed the paper’s wet strength limits.
