Whatman™ Grade 42 Quantitative Filter Paper Available on GSA/VA Contract for Federal Government customers only.

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

Manufacturer: Whatman™ 1442-185

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Catalog No. 09-855F

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    Quantity 100Pack
    Grade 42
    Material High-quality Cotton Linters
    Pore Size (Metric) 2.5μm
    Format Circle
    Thickness (Metric) 200μm
    Porosity Fine
    Diameter (Metric) 185mm
    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

  • Description & Specifications

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