419494

Osmium tetroxide

ACS reagent, ≥98.0%

• Synonym(s): Osmium(VIII)-oxide, ‘Osmic acid’
• Linear Formula: OsO₄
• CAS Number: 20816-12-0
• Molecular Weight: 254.23
• EC Number: 244-058-7
• MDL number: MFCD00011150
• UNSPSC Code: 12352303
• PubChem Substance ID: 329756167
• NACRES: NB.24

Properties

• grade: ACS reagent
• Quality Level: 200
• 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

Description

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.

Safety Information

• Pictograms: GHS06,GHS05
• Signal Word: Danger
• Hazard Statements: H300 + H310 + H330,H314
• Precautionary Statements: P260 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1B
• Storage Class Code: 6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable