Description
Specifications Table
Product Name – Whatman Grade 43 Cellulose Filter Paper
Quantity/Pack Size – 9CM (Pack of 100), 11CM (Pack of 100), 12.5CM (Pack of 100), 15CM (Pack of 100), 18.5CM (Pack of 100)
Form – Circular sheets
Grade – 43 (Medium retention, 8-12 ?m particle size)
Application – General lab filtration, qualitative analysis, air monitoring
Product Overview
Whatman Grade 43 cellulose filter paper is a versatile, medium-retention filter designed for general laboratory applications requiring a balance of flow rate and particle retention. Manufactured from high-purity cellulose fibers, this filter paper delivers consistent performance with a nominal particle retention of 8-12 ?m, making it suitable for routine filtration tasks where moderate clarity is needed. Its high wet strength ensures durability during handling and processing, while its fast flow rate minimizes filtration time without compromising efficiency. The paper is chemically resistant to most acids and alkalis, ensuring compatibility with a wide range of solvents and aqueous solutions. Its smooth surface and uniform thickness reduce clogging, improving overall filtration efficiency. Whatman Grade 43 is widely recognized for its reliability in qualitative analysis, gravimetric determinations, and environmental monitoring, including air pollution studies. The filter paper undergoes rigorous quality control to ensure lot-to-lot consistency, providing researchers with dependable results. Available in multiple diameters, it accommodates various filtration setups, from small-scale experiments to larger-volume applications. Its natural cellulose composition makes it biodegradable, aligning with sustainable lab practices. Whether used in Buchner funnels, vacuum filtration, or simple gravity setups, this filter paper maintains structural integrity even under mechanical stress, ensuring reproducible outcomes across repeated uses.
FAQs
1. What is the particle retention range of Whatman Grade 43 filter paper?
This filter paper retains particles in the 8-12 ?m range, making it ideal for applications requiring moderate filtration precision.
2. Can this filter paper be used with organic solvents?
Yes, Whatman Grade 43 is compatible with most organic solvents, including alcohols, ketones, and hydrocarbons, though pre-wetting may be required for optimal performance.
3. How does the flow rate compare to higher-grade Whatman filters?
The flow rate is faster than high-retention grades like 41 or 42 but slower than coarse filters like Grade 1, offering a balanced performance for general use.
4. Is this filter paper suitable for sterilization procedures?
While it can withstand autoclaving at 121?C, it is not designed for sterile filtration; consider Grade 1 or membrane filters for aseptic applications.
5. What storage conditions are recommended to maintain its performance?
Store in a cool, dry environment away from direct sunlight and chemical vapors to prevent degradation of the cellulose fibers.
