Description
Specifications Table
Product Name – Whatman Grade 0858 Cellulose Filter Paper
Quantity/Pack Size – 11x58CM (Pack of 500), 390x390MM (Pack of 500), 450x450MM (Pack of 500), 570x870MM (Pack of 100)
Form – Sheets
Grade – 0858
Application – General filtration, solvent clarification, particulate removal
Product Overview
Whatman Grade 0858 Cellulose Filter Paper is engineered for high-performance filtration in laboratory settings, offering a balanced combination of retention efficiency and flow rate. Manufactured from 100% pure cellulose fibers, this filter paper ensures minimal extractables and consistent results, making it a reliable choice for critical applications. The medium-speed filtration capability (Herzberg filtration time ~70 seconds) allows for efficient processing of aqueous and organic solutions while maintaining particle retention down to 12-15 μm. Its low ash content (<0.06%) minimizes residue interference in analytical procedures, and the acid-washed treatment enhances chemical compatibility with a wide range of solvents. The uniform porosity and smooth surface reduce clogging during extended use, while the high wet strength (1.5 kN/m) prevents tearing under pressure. This grade is particularly valued for its versatility across gravimetric analysis, environmental monitoring, and sample preparation workflows where both clarity and throughput are essential. The natural white color provides visual contrast for particulate observation, and the pre-cut sheets eliminate the need for manual trimming, saving valuable lab time. Each batch undergoes rigorous quality control to meet ISO 9001 standards, ensuring lot-to-lot consistency for reproducible results in research and quality control environments.
FAQs
1. What is the particle retention range for Whatman Grade 0858 filter paper?
The retention range is 12-15 ?m, making it suitable for filtering fine particulates while maintaining good flow rates.
2. Can this filter paper be used with organic solvents like acetone or methanol?
Yes, the acid-washed cellulose composition provides excellent chemical resistance to most organic solvents, including acetone, methanol, and ethanol.
3. How does the flow rate of Grade 0858 compare to faster grades like 0854?
Grade 0858 offers a medium flow rate (Herzberg ~70s) compared to Grade 0854 (~20s), providing better retention for finer particles while still being faster than high-retention grades.
4. What storage conditions are recommended to maintain the paper’s performance?
Store in a cool, dry environment (15-25?C, 30-50% humidity) in the original packaging to prevent moisture absorption or contamination.
5. Is this filter paper compatible with vacuum filtration systems?
Yes, the high wet strength (1.5 kN/m) makes it suitable for vacuum filtration applications without risk of tearing under standard lab conditions.
