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

$61.95
For larger quantities: Request a Quote
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.