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217646

Sigma-Aldrich

Manganese(IV) oxide

activated, ~85%, <10 μm

Synonym(s):

Manganese dioxide

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About This Item

Empirical Formula (Hill Notation):
MnO2
CAS Number:
1313-13-9
Molecular Weight:
86.94
EC Number:
215-202-6
MDL number:
MFCD00003463
UNSPSC Code:
12352302
PubChem Substance ID:
329752205
NACRES:
NA.21

Quality Level

100

Assay

~85%

form

powder

particle size

<10 μm

mp

535 °C (dec.) (lit.)

SMILES string

O=[Mn]=O

InChI

1S/Mn.2O

InChI key

NUJOXMJBOLGQSY-UHFFFAOYSA-N

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General description

Manganese (IV) oxide is a low cost, low toxic and easy handling inorganic compound widely used as a mild oxidant in organic chemistry. It is mainly used for the selective oxidation of activated alcohols to form α, β-unsaturated aldehydes and ketones.

Application

Manganese (IV) oxide can be used as selective oxidizing agent:
  • In conversion of allylic alcohols to α, β-ethylenic esters or amides.
  • In oxidation of allylic alcohols to α,β-ethylenic aldehydes or ketones.
  • In oxidation of propargylic alcohols, saturated alcohols and benzylic or heterocyclic alcohols.
  • Manganese (IV) oxide can also be used:,In hydration of nitriles to amides.

Pictograms

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Warning

Hazard Statements

H302 + H332,H373

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - STOT RE 2 Inhalation

Target Organs

Brain

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 2

Flash Point(F)

does not flash

Flash Point(C)

does not flash

Certificates of Analysis (COA)

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Ross W Hogue et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 23(57), 14193-14199 (2017-06-09)
Self-assembly of 1:1:2 M
Water dispersible conducting nanocomposites of poly (N-vinylcarbazole), polypyrrole and polyaniline with nanodimensional manganese (IV) oxide.
Biswas M, et al.
Synthetic Metals, 105(2), 99-105 (1999)
Synthesis, characterization, and supercapacitor studies of manganese (IV) oxide nanowires.
Yousefi T, et al.
Materials Science in Semiconductor Processing, 16(3), 868-876 (2013)
Mohammad Mahdi Najafpour
Dalton transactions (Cambridge, England : 2003), 40(15), 3805-3807 (2011-03-02)
A soluble form of colloidal manganese(IV) oxide showed efficient oxygen evolution or water oxidation in presence of oxone, H(2)O(2), cerium(IV) ammonium nitrate and tris(2,2'-bipyridyl)ruthenium(III).
Wen-Hui Kuan et al.
Journal of hazardous materials, 239-240, 152-159 (2012-09-25)
This study examined the reaction of methylene blue (MB) with tunneled manganese oxide pyrolusite regarding pH and reaction time. MB was cleaved through N-demethylation, in which reaction azure B (AB), azure A (AA), azure C (AC), and thionin (TH) were
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