598-62-9 manganous carbonate

Manganese Mn(II) Mn ", MnC03(s) (manganous ion, manganous carbonate solid)... 

In order to balance mineral intake, the following minerals were used in place of the usual mineral mix (% of diet) potassium chloride, 0.32 magnesium oxide, 0.084 manganous carbonate, 0.0123 ferric nitrate, 0.021 zinc carbonate, 0.0056 cupric carbonate, 0.0011 potassium iodate, 0.0004 sodium selenite, 0.00003 chromium potassium sulfate, 0.00193. 

Synonyms manganous carbonate manganese spar rhodochrosite Occurrence and Uses... 

Trihydroxylamino-manganous Carbonate, [Mn(NH20H)3]C03. 2HaO, is produced as a white or grey powder when a solution of sodium carbonate and hydroxyl amine hydrochloride is added to an aqueous solution of manganous chloride.9... 

Double salts with the alkali metals have been obtained,8 and a number of mixed arsenates with calcium, magnesium, lead, iron and other metals occur in Nature, as also do several basic arsenates (see table, pp. 14-16).3 An acid arsenate of composition 5Mn0.2As205.6H20 has been obtained in the crystalline form by stirring manganous carbonate with aqueous arsenic acid.1... 

About 20 gms. of manganous carbonate are made into a thick paste with water in a basin. This is stirred with an equal bulk of pumice in small pieces, and then placed in an air oven at 110°—120° until quite dry. When dry it is loosely packed into a combustion tube, sufficient being taken to fill rather more than half (40 cms.) the length of the tube two asbestos plugs are used to keep the layer in position. 

As an oxidant for manganous ion in acid solution, chlorate ion was found to be the most convenient. Manganous carbonate was dissolved in concentrated nitric acid, and sodium chlorate was added a few crystals at a time until complete oxidation had apparently taken place. The precipitate was allowed to settle then the entire mass was poured into a large volume of water and filtered. The residue was catalytically active at — 20°C. 

Sodium chloride Sodium bromide Sodium iodide Sodium sulphate Sodium silicate Potassium sulphate Lithium chloride Calcium carbonate Calcium sulphate Magnesium sulphate Manganous carbonate Ferrous carbonate. Aluminium phosphate Ammonium nitrate Organic matter... 

Derivation Action of hydrobromic acid with manganous carbonate or manganous hydroxide. 

The manganous carbonate is returned to a clean beaker and enough distilled water is added to make it into a fairly thick paste. If too much water is added, it does not stick well to the pumice. The pumice pebbles are stirred in until they are evenly coated. The beaker is heated on a hot plate while the pumice stones are vigorously stirred. 

Of the five oxidation states of manganese, only Mn(II) forms azides. The normal azide, Mn(N3)2, consists of white, sandy crystals which are chemically and explosively not very stable thus, exposure to the atmosphere causes a brown discoloration (oxidation to Mn02), and the compound explodes above 218°C and is sensitive to impact and friction [54,115,143]. The azide is not easy to make, as dissolving manganous carbonate in hydrazoic acid yields basic products [62,135]. Reaction of the dry carbonate with ethereal hydrazoic acid is impractically slow, but the latter yields Mn(N3)2 when shaken with basic manganese azide for three days [54]. 

Regulatory FDA 21CFR 175.300, 181.25 Manganese carbonate CAS 598-62-9 EINECS/ELINCS 209-942-9 Synonyms Manganese (II) carbonate Manganous carbonate Rhodocrosite Classification Carbonate Empirical CMnOs Formula MnCOs... 

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