CALCIUM PERMANGANATE

Chemical Properties

violet or dark purple, deliquescent crystal(s); made by reacting KMnO4 and CaCl2; used in the textile industry, to sterilize water, and as a deodorizer [HAW93] [MER06]

Uses

Antiseptic, disinfectant, deodorizer; with CaF2 as binder for welding electrode coatings and fluxes.

General Description

Purple crystalline solid. CALCIUM PERMANGANATE is used as a disinfectant and deodorizer, in water purification, and for many other uses.

Air & Water Reactions

Water soluble.

Reactivity Profile

CALCIUM PERMANGANATE is an oxidizing agent. Noncombustible but CALCIUM PERMANGANATE will accelerate the burning of combustible material. If the combustible material is finely divided the mixture may be explosive. Contact with liquid combustible materials may result in spontaneous ignition. Contact with sulfuric acid may cause fires or explosions. Mixtures with acetic acid or acetic anhydride can explode if not kept cold [Von Schwartz 1918 p. 34 ]. Explosions can occur when CALCIUM PERMANGANATE that has been treated with sulfuric acid comes in contact with benzene, carbon disulfide, diethyl ether, ethyl alcohol, petroleum, or other organic matter.

Health Hazard

Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Industrial uses

Calcium permanganate [Ca(MnO4)₂] is used in textile production, as a water-sterilising agent and in dental procedures.

Safety Profile

Poison by intravenous route. See also CALCIUM COMPOUNDS, MANGANESE COMPOUNDS, and PERMANGANATES. A strong oxidant. May explode on contact with acetic acid or acetic anhydride. Ignites on contact with cellulose. Incompatible with hydrogen peroxide.

Purification Methods

Crystallise it from water (3.3mL/g) by partial evaporation in a desiccator. It is deliquescent. Note that it loses oxygen more readily than the potassium salt. It is an oxidising agent.