Osmiumtetraoxid Sealed ampule, Sigma-Aldrich®

Leverantör: SIGMA-ALDRICH MICROSCOPY
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Synonyms: Osmium (VIII) oxide, Osmic acid anhydride, Osmic acid

M-Clarity™ quality level = MQ200

O5500-10X1G O5500-1G O5500-250MG
O5500-10X1GEA 37430 SEK
O5500-10X1G O5500-1G O5500-250MG
Osmiumtetraoxid Sealed ampule, Sigma-Aldrich®
Osmiumtetraoxid

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.


Osmium tetroxide chemically combines with lipids making them insoluble; only 7% of the lipids can be extracted after the fixation. Therefore, the cell membranes comprising phospholipids become black and electron-dense after fixation in osmium tetroxide. It is also used to fix small amount of fat maintained in sections during paraffin processing.


Observera: Due to the hazardous nature of osmium tetroxide, it is recommended to use an ampule opener when using this chemical.

Formel: O₄Os
MW: 254,23 g/mol
Kokpunkt: 130 °C (lit.)
Smältpunkt: 39,5,..41 °C (lit.)
Densitet: 1,04 g/cm³ (20 °C)
Storage Temperature: Omgivande
MDL Number: MFCD00011150
CAS nummer: 20816-12-0
EINECS: 244-058-7
UN: 2471
ADR: 6.1,I
Merck Index: 13,06962
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Specifikation testresultat

Appearance (Colour) Yellow to Yellow-Green
Appearance (Form) Powder or Crystals
Osmium (Os) Report Result
Expiration Date Period 5 Years

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