Whatman Grade 41 Qualitative Filter Paper Circles 42.5 mm, 1441-042 - New 100 Pk

$19.50
New in sealed package. Each pack contains 100 sheets.

The Whatman 1441-042 is an Ashless Grade 41 Quantitative Filter Paper, supplied as 42.5mm diameter circles in packs of 100, offering fast filtration for coarse particles (20-25 µm retention), extremely low ash (<0.007%), high wet strength, and is ideal for general laboratory tasks like air/soil pollution analysis or handling gelatinous precipitates
Specifications
  • Product Code: 1441-042
  • Grade: 41 (Fast, Ashless)
  • Material: High-quality cotton fibers (ashless)
  • Diameter: 42.5 mm (4.25 cm)
  • Particle Retention (Liquid): 20-25 µm (or 20 µm nominal)
  • Ash Content: ≤0.007% (Extremely Low)
  • Filtration Speed: Fast (Herzberg 54 seconds/100 mL/in² or 54 s)
  • Wet Burst Strength: 0.22 psi
  • Thickness: Approx. 215-220 µm
  • Basis Weight: 85 g/m²
  • Packaging: 100 circles per pack
Common Uses:
  • Routine gravimetric analysis
  • Air and soil pollution analysis
  • Filtering coarse particles (like aluminum or iron hydroxides)