Whatman
Grade 5V Fluted Fine Particle Filter Paper, 185mm Circle, 100/Pk SKU: 1205-185

Qualitative Filter Paper - 1205-185

Teaching laboratories introducing filtration techniques need a paper grade that produces reliable results while remaining cost-effective for student use. Natural cellulose wettability eliminates the pre-wetting step required by hydrophobic membranes in aqueous sample filtration. Standardized manufacturing protocols produce papers with retention and flow characteristics that remain constant from the first batch to the last.

Key Filter Paper Characteristics

• Uniform fiber distribution across the sheet ensures consistent particle retention from edge to center for reproducible filtration results.
• Wet strength sufficient for gentle handling during precipitate transfer while maintaining the rapid flow rates of qualitative grades.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.
• At 100g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.

When your analytical procedure specifies a particular grade, the retention and purity characteristics documented above confirm method compliance. Cotton linter cellulose provides the clean fiber background your general analytical methods need without the cost of specialty grades. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.

Diameter

185mm

Flow Speed

Slow

Folded/ Fluted/ Pleated

Yes

Grade

5V

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

0.06%

Nominal Basis Weight (g/ m²)

100g/m²

Particle Retention

2.5um

Pore Size (µm)

2.5

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Teaching Laboratory - Provides consistent and economical filtration media for student exercises in analytical and general chemistry.
• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.