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Whatman™ Quantitative Filter Paper: Grade 42 Circles

Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.

Manufacturer: whatman™  WHT1442320

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Catalog No. 09-856D

  • / Pack of 100 Each

Description & Specifications


Material High-quality Cotton Linters
Flow Rate Slow
Porosity Fine
Quantity 100Pack
Thickness (Metric) 200μm
Pore Size (Metric) 2.5μm
Format Circle
Diameter (Metric) 320mm
Grade 42
For Use With (Application) Highly retentive, for very fine precipitates. Normal loading; limited wet strength. Laboratory standard for critical gravimetric analysis

Ashless grades are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman™ quantitative filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis.

  • Ashless: 0.007% ash maximum
  • Fine (2.5 µm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
  • Herzberg filtration speed of 1870 s
  • Commonly used as a calcium carbonate filter


Accessories for Catalog Number: 09856D

Item Mfr. No. Item Description Price Per Unit Quantity  
Fisherbrand™ Filter Forceps
Easy, effortless handling of membranes and glass fiber filters Each for $11.07