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Supplier: Thermo Scientific
Description: Osmic acid 4% in aqueous solution
Supplier: Thermo Scientific
Description: Osmic acid 99.8% (≥74.4% Os) (metals basis)
Supplier: Thermo Scientific
Description: Osmium tetraoxide 2% in aqueous solution
Supplier: Merck
Description: Os EnCat® 40, Sigma-Aldrich®

Supplier: Merck
Description: Osmium tetroxide (OsO₄) is a heavy tetrahedral, symmetrical molecule composed of osmium, a third-row transition metal. Osmium tetroxide is both a dye, and a non-coagulant fixative agent in electron microscopy primarily used for the examination of biological tissue components in the histopathology laboratory. Specimens are postfixed with osmium testroxide to ensure preservation of the lipids.

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