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.

Brand: Whatman™

Manufacturer Part Number: 1442-055

UNSPSC: 41104929

Code: 69

Additional Details:
Additional Details: Weight: 0.02000kg

Product Code. 10586921

Quantity Price
1 £ 21.25 / Pack of 100
10 £ 17.02 / Pack of 100
In Stock 2
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Description and Specification


Quantity 100Pack
Grade 42
Material High-quality Cotton Linters
Pore Size (Metric) 2.5μm
Format Circle
Thickness (Metric) 200μm
Porosity Fine
Diameter (Metric) 55mm
For Use With (Application) Highly retentive, for very fine precipitates. Normal loading; limited wet strength. Laboratory standard for critical gravimetric analysis
Flow Rate Slow

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