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White cellulose filter paper discs 12.5cm diameter pack of 100

Lab Safety Supply Inc

Lab Safety Supply Inc 12K927 Filter Paper 2.5µm 12.5cm PK100

SKU CH-C1AA-6WHRY

Quantitative cellulose filter paper, 12.5 cm diameter with 2.5 µm pore size, grade 42, pack of 100 discs

  • TypeGround Fault and Current Leakage Testers
  • 5 µm pore size captures fine particles for precise analysis
  • Grade 42 cellulose meets FDA standards for laboratory compliance
  • 17 mm thickness provides consistent flow rates during filtration
  • 5 cm discs fit standard funnels without trimming
  • Pack of 100 sheets supports high-volume testing workflows

Quantitative Filter Paper Grade 42

This quantitative filter paper is manufactured from pure cellulose and cut into 12.5 cm discs. Each pack contains 100 individual filters rated at a uniform 2.5 µm pore size. The Grade 42 designation indicates a slow filtration speed suited to gravimetric analysis. It meets FDA standards for use with gases and liquids in laboratory workflows.

Compatibility and Application Check

Confirm that your analytical method requires a 2.5 µm retention rating and a slow flow rate. The 0.17 mm thickness and flat disc shape must match the funnel or holder dimensions in your setup. Verify that the cellulose material is chemically compatible with the specific solvents or samples you intend to filter. This grade is not intended for rapid throughput or coarse particle separation tasks.

Build Quality and Daily Handling

The cellulose discs are supplied flat and unfluted in a 100-count package for consistent weighing and handling. Uniform pore distribution supports repeatable results across the batch. Individual filters are lightweight and fragile, requiring clean forceps or gloves to prevent tearing or contamination. Store the pack in a dry environment to maintain paper integrity until use.

Highlights

  • 5 µm pore size captures fine particles for precise analysis
  • Grade 42 cellulose meets FDA standards for laboratory compliance
  • 17 mm thickness provides consistent flow rates during filtration
  • 5 cm discs fit standard funnels without trimming
  • Pack of 100 sheets supports high-volume testing workflows

Specifications

BrandLAB SAFETY SUPPLY
TypeGround Fault and Current Leakage Testers

Questions about this item

What is included in the package and what else is needed to use the filter paper?

The box contains 100 cellulose filter paper discs, each 12.5 cm in diameter with a 2.5 µm pore size. A funnel or filter holder and a vacuum source must be purchased separately.

Which grade and pore size should I choose for fine particulate analysis?

Grade 42 with a 2.5 µm pore size is suited for fine particle retention and quantitative gravimetric work.

How does the 2.5 µm pore size perform when filtering liquids in the lab?

The 2.5 µm pores retain fine precipitates while the 0.17 mm thickness and slow porosity give consistent flow rates for quantitative results.

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