Scheele prepared a number of arsenates by the action of arsenic acid on the alkalies. That is why carbonatites contained very low alkalies. These properties include resistance to heat, acids, alkalies, mildew, bleaches, aging, sunlight, and abrasion. Common irritants include detergents, acids, alkalies, oils, organic solvents and reducing agents. Santonin dissolves in alkalies with formation of salts of this carboxylic acid. The primary silicate magma was enriched with alkalies, carbon-dioxide, calcium and deficient with silica. PMA is water-sensitive and unlike PMMA, is not stable against alkalies. Over a period of days, alkalies will hydrolyse the ether bond to form 2,4-dinitrophenol.