Solubility inorganic compounds, sparingly soluble

Extraction of Nonmetallic Inorganic Compounds. Phosphoric acid is usually formed from phosphate rock by treatment with sulfuric acid, which forms sparingly soluble calcium sulfate from which the phosphoric acid is readily separated. However, in special circumstances it may be necessary to use hydrochloric acid ... 

USE- Solvent, molten acelamide is an excellent solvent for many organic and inorganic compounds Solubilizer renders sparingly soluble substances more soluble in water by mere addition or hy fusion Plasticizer stabilizer. Manuf mcihyiamme. denaturing nlcohol In organic syntheses. Caution. Mild irritant... 

Sulphur dioxide will normally oxidize metals at elevated temperatures, simultaneously forming metal sulphides and oxides. Liquid sulphm- dioxide is a relatively efficient solvent with some water-like properties. Polar inorganic compounds are usually insoluble or only sparingly soluble in liquid sulphur dioxide, whereas covalent inorganic and organic compoimds are often dissolved, mostly forming stable solutions. The fact that aromatic hydrocarbons will dissolve more readily than aliphatics in sulphur dioxide is exploited on an industrial scale for the extraction of aromatics from crude oil according to the Edeleanu process. 

Molybdates yield sparingly soluble orange-yellow molybdyl oxinate with oxine solution the pH of the solution should be between the limits 3.3-7.6. The complex differs from other oxinates in being insoluble in organic solvents and in many concentrated inorganic acids. The freshly precipitated compound dissolves only in concentrated sulphuric acid and in hot solutions of caustic alkalis. This determination is of particular interest, as it allows a complete separation of molybdenum from rhenium. 

The common practice of adding iron to breakfast cereals or to vitamin supplements exemplifies the first. Here the first requirements are cosmetic, that the iron-containing compound added should not cause discoloration or adversely affect flavor. It is also an advantage for the added iron-containing compound to be sparingly water-soluble, but for the iron to be reasonably bioavailable and not be incompatible with other constituents (335). There is a great deal of inorganic and physical chemistry involved in these matters, most of which is buried in the technical and patent literature. 

Freshly prepared [Cr(en)3] Br3 is a yellow solid which slowly turns violet-blue, probably because of some photochemically induced reaction (cf. Reference 9). The compound is sparingly soluble in water, from which it can be recrystallized as the hydrate. The resolution of [Cr(en)3]3+ salts by means of tartrate has been described in a previous volume of Inorganic Syntheses.11... 

This test applies to all metals and sparingly soluble inorganic metal compounds. Exceptions, such as certain water reactive metals, should be justified. 

Draft Report of the OECD Workshop on Aquatic Toxicity Testing of Sparingly Soluble Metals, Inorganic Metal Compounds and Minerals , Sept. 5-8,1995, Ottawa... 

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