Whatman 0.45um 47mm Sterile Membrane Filters 100 Units 7141-104

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Product Features

0.45µm cellulose nitrate membrane filter with grid, sterile, 47mm diameter.
Gridded surface (3.1mm intervals) make filters ideal for colony counting.
Special non-toxic ink used is completely free from bacterial growth inhibitors.
Performance improvements include very narrow pore size distribution and low levels of extractables.
Has a noticeably improved flexibility; is made to tolerate abuse.

Recommended for the majority of routine applications, this grade is manufactured under strictly controlled cleanroom conditions. Can directly replace the general purpose membrane filters of other manufacturers without requiring any significant change of technique.

Other benefits and features include

Improved strength and flexibility to tolerate abuse without sacrificing integrity.
Low extractable levels—approximately 2%. Autoclavable at 121°C (250°F), with low shrinkage. Can be heated to 130°C (266°F) without damage. Can be autoclaved two or three times without major changes in physical properties.