LabExact
Grade CFP41 Cellulose Filter Paper, Qualitative - 20µm, 150mm - 100/pk SKU: LE-CFP41-150

Featuring high-flow cellulose fiber construction delivering exceptional filtration speeds for initial separation and clarification procedures. Very fast flow rates and loose retention characteristics make this grade ideal for initial separation of gelatinous precipitates while maintaining reliable 20µm particle retention. Ultra-low ash content below 0.01% ensures minimal interference during subsequent analytical procedures, accelerating your sample preparation workflows for qualitative analysis applications requiring rapid throughput and effective preliminary separations.

Key Cellulose Membrane Characteristics

Random matrix cellulose fiber construction performs separation by trapping particulates within the depth of the media for reliable filtration performance
Hydrophilic surface chemistry delivers immediate wetting and optimal flow characteristics with aqueous solutions and polar solvents
Extremely low ash content below 0.01% minimizes residual contamination during subsequent gravimetric or spectroscopic analysis
20µm retention capability effectively captures suspended solids while maintaining fast flow rates for high-volume sample processing
Consistent white appearance provides excellent visual contrast for detecting filtered particulates and assessing filtration completeness

Key Construction Characteristics

Standard 150mm diameter accommodates large sample volumes in funnel filtration setups and gravity-fed separation procedures
0.220mm thickness delivers structural integrity during filtration while maintaining rapid flow characteristics for efficient processing
100-count packaging provides convenient laboratory quantities with protective storage to maintain filter cleanliness and performance
Compatible with standard laboratory funnels, vacuum filtration assemblies, and gravity-flow separation equipment
Industry-standard equivalents include Whatman 40, S&S 589/2, Millipore 223, Ahlstrom 74, and MFS 3 ensuring broad method compatibility

Grade CFP41 filters excel in preliminary separation procedures where rapid clarification takes priority over fine particle retention, making them essential for initial processing of viscous samples, precipitate separation, and sample preparation prior to finer filtration stages. Natural fiber construction commonly used to clarify liquid samples and for determination and identification of particulates in both liquid and gas samples transforms these filters into versatile laboratory workhorses. ASTM E832 compliant construction¹ ensures validated performance characteristics, providing confidence for your critical qualitative analysis procedures demanding both speed and reliability in preliminary sample processing applications.

¹ ASTM E832 Standard Specification for Laboratory Filter Papers: https://www.astm.org/e0832-81r24.html