Grade 91 Qualitative Filter Paper Wet-Strengthened, 125mm Circle, Pks of 100, 4000ct SKU: 1091-125

Qualitative Filter Paper - 1091-125

Laboratories processing dozens of samples daily need a qualitative filter paper that performs reliably from the first sheet to the last. Controlled fiber density produces documented flow rate and retention characteristics that remain consistent across production lots. Standardized manufacturing protocols produce papers with retention and flow characteristics that remain constant from the first batch to the last.

Key Filter Paper Characteristics

• Wet-strengthened construction provides the mechanical durability needed for technical filtration applications under sustained vacuum.
• Standard qualitative cellulose filter paper provides reliable particle retention for gravity and vacuum filtration across routine laboratory workflows.
• Rated at 10.0um particle retention, the fiber matrix provides a defined cutoff for consistent separation across analytical batches.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.
• Non-hardened cellulose delivers the flow rates and retention that routine methods require at practical cost per determination.

When your quality system requires documented specifications for every consumable, the grade data above provides the traceability your auditors expect. Sheet-to-sheet consistency means your training investment carries forward as new staff learn the same predictable filtration behavior. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

125mm

Flow Speed

Medium Fast

Folded/ Fluted/ Pleated

No

Grade

91

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

71g/m²

Particle Retention

10.0um

Pore Size (µm)

10

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.
• Enzyme Clarification - Removes particulates from enzyme solutions before activity assays in biochemistry and industrial testing.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• Teaching Laboratory - Provides consistent and economical filtration media for student exercises in analytical and general chemistry.