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419494

Sigma-Aldrich

Osmium tetroxide

ACS reagent, ≥98.0%

Synonym(s):
Osmium(VIII)-oxide, ‘Osmic acid’
Linear Formula:
OsO4
CAS Number:
Molecular Weight:
254.23
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NB.24

grade

ACS reagent

Quality Level

vapor density

8.8 (vs air)

vapor pressure

7 mmHg ( 20 °C)

description

identification passes test

assay

≥98.0%

form

crystalline

reaction suitability

reagent type: oxidant

clarity of soln

passes test

bp

130 °C (lit.)

mp

39.5-41 °C (lit.)

solubility

acetone: soluble(lit.)
carbon tetrachloride: soluble(lit.)
methyl tert-butyl ether: soluble(lit.)
toluene: soluble(lit.)
water: soluble(lit.)

storage temp.

2-8°C

SMILES string

O=[Os](=O)(=O)=O

InChI

1S/4O.Os

InChI key

VUVGYHUDAICLFK-UHFFFAOYSA-N

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Application

Osmium tetroxide may be used in the following processes:
  • As a tissue-staining contrast agent for staining tissues.
  • Lactonization of alkenols to lactones by oxidation.
  • Synthesis of the corresponding tetrols from 1,5-cycloocatdiene by bishydroxylation.

Packaging

250 mg in ampule
1 g in ampule

Pictograms

CorrosionSkull and crossbones

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1B

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Certificate of Analysis

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Certificate of Origin

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