Manganese heptoxide

Manganese(VII) oxide
Manganese(VII) oxide
Ball-and-stick model of manganese heptoxide
Manganese(VII) oxide
Names
IUPAC name
Manganese(VII) oxide
Other names
Manganic oxide
dimanganese heptoxide
Permanganic anhydride
Permanganic oxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.829 Edit this at Wikidata
EC Number
  • 235-025-8
  • InChI=1S/2Mn.7O/q;;7*-2
    Key: ZEFXULJEOUCCOQ-UHFFFAOYSA-N
  • O=[Mn](=O)(=O)O[Mn](=O)(=O)=O
Properties
Mn2O7
Molar mass 221.87 g/mol
Appearance dark red oil (room temp.), green if in contact with sulfuric acid
Density 2.79 g/cm3
Melting point 5.9 °C (42.6 °F; 279.0 K)
Boiling point explodes on heating
decomposes to permanganic acid, HMnO4
Structure
monoclinic
bitetrahedral
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 explosive, strong oxidizer, very corrosive
GHS labelling:
GHS01: ExplosiveGHS03: OxidizingGHS05: CorrosiveGHS06: Toxic
Danger
H201, H271, H314, H300+H310+H330
P260, P284, P283, P221
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 4: Readily capable of detonation or explosive decomposition at normal temperatures and pressures. E.g. nitroglycerinSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
4
0
4
OX
Related compounds
Related compounds
 Re2O7
KMnO4
Tc2O7
Cl2O7
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Manganese(VII) oxide (manganese heptoxide) is an inorganic compound with the formula Mn2O7. Manganese heptoxide is a volatile liquid with an oily consistency. It is a highly reactive and powerful oxidizer that reacts explosively with nearly any organic compound. It was first described in 1860.[1] It is the acid anhydride of permanganic acid.

  1. ^ Aschoff, H. Ann. Phys. Chem. Ser. 2 volume 111 (1860) page 217 and page 224.