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

Mô tả

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 ΔfHo298	?520 kJ·mol?1[1]
Standard molar entropy So298	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)

ỨNG DỤNG

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

Keyword:Nanometer materials

Phiếu kiểm nghiệm

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