Imprimer

Acide osmique Sealed ampule, Sigma-Aldrich®

Fournisseur: SIGMA ALDRICH MICROSCOPY
Danger

Synonyms: Osmium (VIII) oxide, Osmic acid anhydride, Osmic acid

M-Clarity™ (Niveau de Qualité) = MQ200

O5500-10X1G O5500-1G O5500-250MG
O5500-10X1GEA 3650 EUR
O5500-10X1G O5500-1G O5500-250MG
Acide osmique Sealed ampule, Sigma-Aldrich®
Acide osmique

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.


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

Formule: O₄Os
MW: 254.23 g/mol
Point d'ébullition: 130 °C (lit.)                      
Point de fusion: 39,5...41 °C (lit.)                      
Température de stockage: Température ambiante
Numéro MDL: MFCD00011150
Numéro CAS: 20816-12-0
EINECS: 244-058-7
ONU: 2471
ADR: 6.1 I
Merck Index: 13,06962
https://digitalassets.avantorsciences.com/adaptivemedia/rendition?id=bddfe1a7aed58a3b9b547dbbbe80dcc563d7d59c&vid=1b2c4cc0a5ebee06aa6431f68949c29dd5c3467b&prid=web&clid=SAPDAM

Commander maintenant

Résultats des tests de spécification

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


Learn more

About VWR

Avantor is a vertically integrated, global supplier of discovery-to-delivery solutions for...

Plus About VWR