Manganese dioxide | Yunnan Titan New Materials Technology Co.,Ltd

Description

Manganese(IV) oxide is the inorganic compound with the formula MnO₂. This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules. The principal use for MnO₂ is for dry-cell batteries, such as the alkaline battery and the zinc-carbon battery. MnO₂ is also used as a pigment and as a precursor to other manganese compounds, such as KMnO₄. It is used as a reagent in organic synthesis, for example, for the oxidation of allylic alcohols.

Several polymorphs of MnO₂ are claimed, as well as a hydrated form. Like many other dioxides, MnO₂ crystallizes in the rutile crystal structure (this polymorph is called β-MnO₂), with three-coordinate oxide and octahedral metal centres. MnO₂ is characteristically nonstoichiometric, being deficient in oxygen. The complicated solid-state chemistry of this material is relevant to the lore of "freshly prepared" MnO₂ in organic synthesis.

Manganese dioxide


IUPAC name Manganese oxide Manganese(IV) oxide
Other names Pyrolusite
Identifiers
CAS number	1313-13-9^Y
PubChem	14801
ChemSpider	14117^Y
EC number	215-202-6
Jmol-3D images	Image 1
SMILES · O=[Mn]=O
InChI · InChI=1S/Mn.2O^Y Key: NUJOXMJBOLGQSY-UHFFFAOYSA-N^Y
Properties
Molecular formula	MnO₂
Molar mass	86.9368 g/mol
Appearance	Brown-black solid
Density	5.026 g/cm³
Melting point	535 °C (decomposes)
Solubility in water	insoluble
Thermochemistry
Std enthalpy of formation Δ_fH^o₂₉₈	?520 kJ·mol^?1[1]
Standard molar entropy S^o₂₉₈	53 J·mol^?1·K^?1[1]
Hazards
MSDS	ICSC 0175
EU Index	025-001-00-3
EU classification	Harmful (Xn) Oxidizer (O)
R-phrases	R20/22
S-phrases	(S2), S25
Flash point	535 °C
Related compounds
Other anions	Manganese disulfide
Other cations	Technetium dioxide Rhenium dioxide
Related manganese oxides	Manganese(II) oxide Manganese(II,III) oxide Manganese(III) oxide Manganese heptoxide
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

USES

Depolarizing agent, good decolorizing agent in the glass industry, used in dry-cell batteries,

Match industry the accelerant, ceramic, enamel glaze raw materials and manganese salts

For pyrotechnics, water purification, in addition to iron, pharmaceuticals, fertilizers and fabric dyeing.

Keywords:Electronic chemicals;Fine ceramics

Report

Product name	Manganese dioxide	CAS：1313-13-9
Description	Black orthorhombic system crystals or brown-black powder
TEST ITEMS		TEST RESULTS
MnO₂		92.18
Fe		0.015
Cu		0.0005
Co		0.0010
Ni		0.0006
Pb		0.0007
H₂O		1.42