ANHYDRONE®, magnesium perchlorate

This Section Ls restricted to a description of some of the work of Ander-gon, 8-a> who has ably applied the quantitative analysis of vapors by infrared spectroscopy to analytical problems in carbohydrate chemistry, principally to the Zeisel alkoxyl determination. In this particular application, the usual Zeisel apparatus was used, and the volatile iodide liberated was carried by a flow of nitrogen into a cold trap where it was collected quantitatively Anhydrone (magnesium perchlorate) was used for removing water vapor which would otherwise interfere in the spectrum. The contents of the trap were allowed to vaporize into an evacuated gas-cell, and air was then admitted through the trap to sweep all the vapor into the gas-cell. Double-beam compensation of atmospheric water vapor and carbon dioxide was not upset by this procedure, which also served the purpose of increasing the sensitivity of the infrared method by the well known pressure-broadening effect. The complete spectrum of the vapor... 

Two absorbents are required, one for water vapour, the other for carbon dioxide. The absorbents for water vapour which are generally employed are (a) anhydrous calcium chloride (14-20 mesh), (b) anhydrous calcium sulphate ( Drierite or Anhydrocel ), and (c) anhydrous magnesium perchlorate ( Anhydrone ). Both (b) and (c) are preferable to (a) (c) absorbs about 50 per cent of its weight of water, but is expensive. Anhydrous calcium chloride usually contains a little free lime, which will absorb carbon dioxide also it is essential to saturate the U-tube containing calcium chloride with dry carbon dioxide for several hours and then to displace the carbon dioxide by a current of pure dry air before use. 

The use of the perchlorate as desiccant in a drybag where contamination with organic compounds is possible is considered dangerous [1], Magnesium perchlorate ( Anhydrone ) was inadvertently used instead of calcium sulfate (anhydrite) to dry an unstated reaction product before vacuum distillation. The error was realised and all solid was filtered off. Towards the end of the distillation, decomposition and an explosion occurred, possibly owing to the presence of dissolved magnesium perchlorate, or more probably to perchloric acid present as impurity in the salt [2]. 

MAGNESIUM PERCHLORATE Anhydrone, Dehydrlte, Magnesium perchlorate, anhydrous, Magnesium perchlorate hexahydrate Oxidizing Materisl, II 1 0 0 oxy... 

An early synthesis of water-free Nd carboxylates was reported by Roberts in 1961 [210]. Nd203 is reacted with an excess of carboxylic acid to yield the Nd carboxylate trihydrate by recrystalhzation in water. Subsequent dehydration is achieved by storage of the trihydrate over anhydrone (i.e. magnesium perchlorate) in vacuo. Dehydration of the trihydrate is also achieved by heating it at 150-180 °C for 2-3 h under a flow of dry nitrogen at reduced pressure [176]. Today, the amide route is the most commonly used laboratory method for the preparation of anhydrous Nd-carboxylates. In this route... 

SYNS ANHYDRONE DEHYDRITE MAGNESIUM PERCHLORATE PERCHLORATE de MAGNESIUM (FRENCH)... 

Anhydrone Trade name for magnesium perchlorate, a drying agent. 

Anhydrone, anhydrous magnesium perchlorate, Mg(CI04)2, 10 to 15 g/S Detergent, liquid, 1 mL/S Diluting solution... 

ANHYDRONE (10034-81-8) A powerful oxidizer. Potentially violent or explosive reaction with reducing agents, alcohols, ammonia gas, argon (wet), butyl fluorides, dimethyl sulfoxide, ethylene oxide, fluorobutane (wet), fuels, hydrazines, hydrocarbons, mineral acids, powdered metals, organic matter, phosphorus, trimethyl phosphite. Mixture with ethanol forms explosive ethyl perchlorate. Incompatible with alkenes, and many other materials. Shock may cause magnesium perchlorate to explode. 

Chemical Designations - Synonyms Anhydrone Dehydrite Magnesium perchlorate, anhydrous Magnesium perchlorate, hexahydrate Chemical Formula Mg(C104)2. 

---