Chloral, physical properties

The solution frequently becomes warm,12 and its refractive index,1 viscosity,2 freezing point-composition curve,3 and ultraviolet absorption spectrum 36 are not those which would be expected if no reaction took place. Usually hydrates or hemiacetals of simple aldehydes are too unstable to be isolated, but a number of them are actually known and their physical properties have been determined.4 When the carbonyl group is attached to an electron-attracting group (making the carbonyl carbon atom abnormally positive), stable hydrates are frequently formed. Glyoxal, chloral, and ketomalonic acid are common examples. 

For the packaging of suppositories the chemical and physical properties of the active substance and the base have to be considered. This should be done with respect to sensitivity to oxygen and light, compatibility with the (plastic) package, material evaporation (chloral hydrate) and hygroscopicity (macrogol and different active substances). 

The complex of physical-chemical properties enable to hold out the unsaturated halogen containing block-copolysulfonarilats as warm-, thermo- and fire-proof constructive and membranous materials. The accessibility of the feedstock for receiving monomers on the basis of chloral, and also the manufacturability acceptor-catalytic polycondensation mekes it possible to refer the new halogen containing unsaturated block-copolysulfonarilats to industrialy-perspective polymeric materials. 

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