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Whatman™ Grade 42 Quantitative Filter Paper

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

Manufacturer: whatman™  1442-042

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Catalog No. 09-856A

  • / Pack of 100 Each

Description & Specifications


Quantity 100Pack
Grade 42
Material High-quality Cotton Linters
Pore Size (Metric) 2.5μm
Format Circle
Thickness (Metric) 200μm
Porosity Fine
Diameter (Metric) 425mm
For Use With (Application) Highly retentive, for very fine precipitates. Normal loading; limited wet strength. Laboratory standard for critical gravimetric analysis
Flow Rate Slow

Quantitative papers with fine retention

  • 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: 09856A

Item Mfr. No. Item Description Price Per Unit Quantity