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White sterile membrane filter discs 4.7cm diameter pack of 100

Lab Safety Supply Inc

Lab Safety Supply Inc LABEXACT 14A842 Filter Paper 0.45um 4.7cm PK100

SKU CH-6T30-83TQW

Sterile membrane filter paper with 0.45 µm pores and 4.7 cm diameter, supplied in packs of 100 for air or liquid analysis

  • TypeGround Fault and Current Leakage Testers
  • 45 µm pores capture fine particles for reliable lab filtration
  • 47 mm diameter fits standard filter holders and funnels
  • Mixed cellulose esters membrane works with both air and liquid samples
  • Sterile, FDA-grade sheets meet strict quality requirements for sensitive tests
  • Pack of 100 filters supports high-throughput workflows without frequent reordering

Lab Filter Paper 0.45 µm 4.7 cm

Sterile mixed cellulose ester membranes measure 47 mm in diameter with a 0.45 µm pore size for air and liquid filtration. Each pack contains 100 circles graded to FDA standards. The hydrophilic material releases solvents during use. Suitable for laboratory sampling workflows.

Condition and Handling

Supplied new in sealed packaging to maintain sterility until opened. No power draw, noise or thermal output is produced by the filter media itself. Performance depends on the external vacuum or pressure system used. Store at room temperature away from moisture.

Pack Contents and Use

The pack of 100 sterile discs eliminates the need for individual autoclaving before each test. FDA grade rating supports compliance in regulated environments. Hydrophilic properties allow direct wetting with aqueous solutions. Solvent release characteristic suits gravimetric analysis methods.

Highlights

  • 45 µm pores capture fine particles for reliable lab filtration
  • 47 mm diameter fits standard filter holders and funnels
  • Mixed cellulose esters membrane works with both air and liquid samples
  • Sterile, FDA-grade sheets meet strict quality requirements for sensitive tests
  • Pack of 100 filters supports high-throughput workflows without frequent reordering

Specifications

BrandLAB SAFETY SUPPLY
TypeGround Fault and Current Leakage Testers

Questions about this item

How do I install the 47 mm membrane filter in a standard holder without tearing the 0.45 um pores?

Place the sterile mixed cellulose ester disc grid-side up on the support screen, secure the funnel clamp evenly, then apply vacuum gradually; the hydrophilic material seals itself once wetted with liquid.

What replacement schedule applies to these sterile 0.45 um filters after filtering solvents?

Each disc is single-use; discard after one filtration run because solvent exposure can release extractables and the sterile barrier cannot be re-validated.

At what point does the 0.45 um pore structure clog during continuous aqueous filtration?

Clogging occurs when retained particulates form a cake layer on the mixed cellulose ester surface; flux drops sharply once the hydrophilic pores are bridged by accumulated solids.

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