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Merck

419494

Osmium tetroxide

ACS reagent, ≥98.0%

Synonym(s):

Osmium(VIII)-oxide, ‘Osmic acid’

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About This Item

Linear Formula:
OsO4
CAS Number:
20816-12-0
Molecular Weight:
254.23
MDL number:
MFCD00011150
NACRES:
NB.24
PubChem Substance ID:
329756167
UNSPSC Code:
12352303
EC Number:
244-058-7
assay:
≥98.0%
grade:
ACS reagent
form:
crystalline
solubility:
acetone: soluble(lit.)
carbon tetrachloride: soluble(lit.)
methyl tert-butyl ether: soluble(lit.)
toluene: soluble(lit.)
water: soluble(lit.)

Product Name

Osmium tetroxide, ACS reagent, ≥98.0%

InChI key

VUVGYHUDAICLFK-UHFFFAOYSA-N

InChI

1S/4O.Os

SMILES string

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

grade

ACS reagent

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

Quality Level

200

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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.

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

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

Storage Class

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

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX8017
MKCR1168
MKCS0416
MKCQ1838
MKCP8795

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On the Stereoselectivity in Bisdihydroxylation of 1,5-cyclooctadiene with Osmium Tetroxide.
Kawazoe K, et al.
Synthetic Communications, 31(14), 2107-2112 (2001)
Vacuum ultraviolet spectra of osmium tetroxide and ruthenium tetroxide.
Roebber JL, et al.
J. Chem. Phys. , 60(8), 3166-3173 (1974)
Direct Lactonization of Alkenols via Osmium Tetroxide-Mediated Oxidative Cleavage.
Schomaker JM, et al.
Organic Letters, 5(17), 3089-3092 (2003)
P Maupin-Szamier et al.
The Journal of cell biology, 77(3), 837-852 (1978-06-01)
We have studied the destruction of purified muscle actin filaments by osmium tetroxide (OsO4) to develop methods to preserve actin filaments during preparation for electron microscopy. Actin filaments are fragmented during exposure to OsO4. This causes the viscosity of solutions
The crystal structure of osmium tetroxide.
Ueki T, et al.
Acta Crystallographica, 19(2), 157-160 (1965)
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