manganese dioxide, pyrolusite, MnO2, black oxide of manganese
2D Structure
Physical Properties
Density
5.03 g/mL at 25°C
Boiling Point
None°C
Melting Point
535.0°C
Flash Point
None°C
Vapor Pressure
0.0 kPa at 20°C
Refractive Index
nD = 2.24
Dielectric Constant
ε = 5.0
Safety & GHS Classification
IrritantGHS09
H302: Harmful if swallowed
H332: Harmful if inhaled
H412: Harmful to aquatic life with long lasting effects
Storage: Store in dry, well-ventilated area. Strong oxidizer in contact with organic materials. Dust irritant — use dust mask. Keep away from reducing agents.
Material Compatibility Matrix
Plastics
Material
Rating
PTFE
Excellent
PVC
Good
PE
Good
PP
Good
PEEK
Good
PVDF
Good
Rubbers
Material
Rating
Viton
Good
NBR
Good
EPDM
Good
Silicone
Good
FKM
Good
Metals
Material
Rating
Stainless 316
Good
Aluminum
Poor
Copper
Poor
Brass
Poor
Applications
Alkaline battery cathode material (primary use)
Steel production (ferromanganese alloy)
Glass decolorizer
Catalyst (oxidation reactions)
Water treatment (potassium permanganate production)