Description
Specifications Table
Product Name – Whatman ME25/31 STL Membrane Filter
Quantity/Pack Size – 47MM, 0.45uM (Pack of 400) | 50MM, 0.45uM (Pack of 400)
Form – Membrane Disc
Grade – Laboratory Grade
Application – Sterile Filtration, Clarification, Particle Removal
Product Overview
The Whatman ME25/31 STL membrane filter is engineered for high-efficiency filtration in laboratory applications. Constructed from mixed cellulose esters, this hydrophilic membrane ensures consistent flow rates and low extractables, making it suitable for critical filtration tasks. The 0.45?m pore size effectively retains microorganisms, particles, and colloids while allowing rapid liquid passage. Its sterile, non-pyrogenic design minimizes contamination risks, and the membrane?s mechanical strength prevents tearing during handling. Compatible with aqueous and mild organic solutions, this filter is widely used in sample preparation, media sterilization, and environmental testing. The uniform pore distribution guarantees reproducible results, while the white, grid-marked surface aids in particle visualization. Available in 47MM and 50MM diameters, each pack contains 400 filters for cost-effective bulk use. The Whatman ME25/31 STL combines reliability with performance, meeting stringent lab standards for clarity and purity.
FAQs
1. What is the shelf life of the Whatman ME25/31 STL membrane filter?
When stored in original packaging under dry, cool conditions, the shelf life is typically 5 years from the date of manufacture.
2. Can this filter be autoclaved for sterilization?
Yes, the Whatman ME25/31 STL membrane filter can be autoclaved at 121?C for 15?20 minutes without compromising integrity.
3. Is this filter compatible with organic solvents?
It is compatible with mild organic solvents like ethanol and isopropanol but not recommended for strong solvents like DMSO or acetone.
4. How should unused filters be stored?
Store in a sealed container away from direct sunlight, moisture, and extreme temperatures to prevent degradation.
5. What alternatives exist for higher pore size requirements?
For larger particles, consider Whatman ME28 (0.8?m) or ME30 (1.2?m) membranes from the same series.
