Description
Specifications Table
Product Name – Whatman Grade 42 Pyramid Fold Filter Paper
Quantity/Pack Size – 90MM (Pack of 1000), 110MM (Pack of 1000), 125MM (Pack of 100), 125MM (Pack of 1000)
Form – Pyramid-folded sheets
Grade – 42 (Medium retention, fast flow)
Application – General lab filtration, qualitative analysis
Product Overview
Whatman Grade 42 filter paper is a medium-retention, fast-flow qualitative filter designed for general laboratory filtration tasks. Manufactured from high-purity cellulose fibers, this pyramid-folded paper ensures consistent filtration performance with minimal particle retention. Its low ash content (<0.06%) makes it suitable for applications where residue must be minimized. The pyramid-fold design increases surface area, enhancing filtration speed while maintaining structural integrity. With a nominal particle retention of 2.5?m, it effectively captures fine particulates without clogging. The paper’s uniform thickness and porosity provide reliable results across repeated uses. Its acid-washed treatment removes impurities, ensuring compatibility with a wide range of solvents and solutions. The medium flow rate balances speed and retention, making it versatile for routine lab procedures. Available in multiple diameters to fit standard filtration apparatus, this filter paper maintains dimensional stability even when wet. Its consistent performance and high purity make it a standard choice for qualitative analysis in research and educational settings.
FAQs
1. What is the particle retention capacity of Whatman Grade 42 filter paper?
This filter paper has a nominal particle retention of 2.5?m, making it suitable for capturing fine particulates while maintaining good flow rates.
2. Can this filter paper be used with acidic solutions?
Yes, Whatman Grade 42 is acid-washed during manufacturing, which makes it compatible with most acidic solutions commonly used in laboratories.
3. How does the pyramid-fold design benefit filtration?
The pyramid-fold increases the effective surface area, allowing for faster filtration rates compared to flat sheets while maintaining the same retention properties.
4. What is the ash content of this filter paper?
The ash content is less than 0.06%, which is particularly low and makes it suitable for applications where minimal residue is required.
5. Is this filter paper autoclavable?
While it can withstand standard lab conditions, it’s not recommended for autoclaving as the high heat and pressure may compromise its structural integrity.
