Whatman
Grade 113 Qualitative Filter Paper Wet-Strengthened, 150mm Circle, 100/Pk SKU: 1113-150

Qualitative Filter Paper - 1113-150

Separating precipitates from analytical solutions requires a cellulose matrix with the right balance of retention and flow rate. Cellulose fiber matrix maintains structural integrity through standard gravity and light vacuum filtration conditions. Standardized manufacturing protocols produce papers with retention and flow characteristics that remain constant from the first batch to the last.

Key Filter Paper Characteristics

• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• Standard qualitative cellulose filter paper provides reliable particle retention for gravity and vacuum filtration across routine laboratory workflows.
• Wet-strengthened construction provides the mechanical durability needed for technical filtration applications under sustained vacuum.
• Nominal basis weight of 125g/m² reflects the fiber density that determines flow rate, retention, and mechanical handling characteristics.
• Pure cellulose fiber construction delivers consistent flow rates and predictable retention for general sample clarification and preparation.

If your environmental monitoring program depends on sample comparability to determine trends, the production consistency of this filter paper protects your data validity. Under these conditions, economical unit cost at the pack quantities routine laboratories consume keeps your filtration budget aligned with actual throughput demands. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

150mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

No

Grade

113

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

125g/m²

Particle Retention

30um

Pore Size (µm)

30

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Enzyme Clarification - Removes particulates from enzyme solutions before activity assays in biochemistry and industrial testing.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.
• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.