dimanganese heptaoxide

Molecular Structure of Manganese(vii) oxide (CAS NO.12057-92-0):

IUPAC Name: Manganese(VII) oxide
Categories:explosives
Molecular formula: 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
Boiling point: explodes on heating
sublimes at −10 °C
Solubility in water: decomposes to permanganic acid, HMnO4
Related compounds Re2O7; KMnO4; Tc2O7
Synonyms of Manganese(vii) oxide (CAS NO.12057-92-0): dimanganese heptaoxide ; Manganese(VII) oxide

Main hazards explosive, strong oxidizer

Manganese and its compounds are on the Community Right-To-Know List.

An unstable explosive sensitive to friction, impact or heating above 40°C. As sensitive as mercury fulminate. Explodes on contact with organic materials (e.g., solvents, oils, fats, fibers, grease). A powerful oxidizer. See also MANGANESE COMPOUNDS.

 Manganese(VII) oxide (CAS NO.12057-92-0), is known as permanganic acid, is an inorganic compound with the formula Mn₂O₇. This volatile liquid is highly reactive . It is a dangerous oxidizer.It is soluble in CCl₄, melts at only 5.9 °C, and sublimes at −10 °C.

 Mn₂O₇ arises as a dark green oil by the addition of H₂SO₄ to KMnO₄. The reaction initially produces permanganic acid, HMnO₄ (structurally, HOMnO₃), which spontaneously loses water to form its anhydride, Mn₂O₇.
2 KMnO₄+ 2 H₂SO₄ → Mn₂O₇ + H₂O + 2 KHSO₄ ,Mn₂O₇ can react further with sulfuric acid to give the remarkable cation MnO₃⁺, which is isoelectronic with CrO₃:Mn₂O₇ + 2 H₂SO₄ → 2 [MnO₃]+[HSO₄]⁻ + H₂O Mn₂O₇ decomposes near room temperature, explosively so at > 55 °C. The explosion can be initiated by striking the sample or by its exposure to oxidizable organic compounds. The products are MnO2 and O₂.Ozone is also produced, giving a strong smell to the substance.

 Hazardous properties of Manganese(vii) oxide (CAS NO.12057-92-0) is explosives friction, shock, sparks, shock-sensitive explosive; with organic mixed explosive.Flammabily, it should be kept in drying; fire; anti-vibration, anti-friction, anti-shock environment, and stored separate with from organic matter, carbon dioxide, dry powder, sand, water mist fire extinguishing agent can be used if emergency.