Sodium chlorate melting point

Sodium chlorate forms colorless, odorless crystals or white granules. The melting point of the crystals is 248 Celsius, but it begins to decompose into oxygen and sodium perchlorate when heated to 300 Celsius. The crystals are highly soluble in water, but relatively insoluble in alcohol, and most common organic solvents. Sodium chlorate is widely used in pyrotechnic compositions, and in the preparation of ammonium chlorate, and perchlorate, which are used in powerful solid rocket fuels. 

At ordinary temperature, sodium perchlorate crystallizes as the very deliquescent monohydrate, but above 50° C. as the anhydrous salt.2 Its deliquescent character hinders its technical application. The melting-point 3 of the anhydrous salt is 482° C. On heating, it is decomposed into chloride and oxygen, a proportion of chlorate being simultaneously formed.4 From cryoscopic experiments with sodium sulphate as solvent, Lowenherz6 inferred the molecular formula to be NaCIO. ... 

In an autoclave or an iron pipe with a cap which can be screwed on (see page 64), heat a mixture of 10 parts commercial sodium anthraquinonemonosulphonate, 30 parts of sodium hydroxide, 1.8 parts of finely pulverised potassium chlorate, with 40 parts of water, for 20 hours to 170°. After cooling, the melt is boiled out with water several times, and acidified at the boiling-point of the solution in a large dish with concentrated hydrochloric acid. The alizarin separating out is then filtered off according to the quantity, either with suction or with the aid of a filter-press, washed with water, pressed out on a porous plate, and dried in an air-bath at 120°. In order to obtain it completely pure, it is distilled rapidly from a small retort, and is... 

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