Whatman

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Whatman Quantitative Filter Papers, Ashless, Grade 42, 9 cm, 100/pk

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$61.95

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MFR:: 1442-090
Medex SKU:: WTM-1442-090
UPC:: 24140020698
Packing Info:: 100/pk
Usually Ships:: 1 - 2 Business Days
Freight Quote Button:: False

Description

Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.

Acid hardened to give high wet strength and chemical resistance with extremely low ash content.

The tough surface makes these filters suitable for a wide range of critical filtration procedures.

Particle Retention: >2.5m.

Porosity: Medium.

Filtration Speed: ASTM, 240 seconds; Herzberg, 1870 seconds.

Surface: Smooth, dense texture.

Highly retentive, for very fine precipitates.

Normal loading; limited wet strength.

Laboratory standard for critical gravimetric analysis.

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