DAP is also used as aÃ yeast nutrient in winemakingÃ andÃ mead-making; as an additive in some brands of cigarettes purportedly as aÃ nicotineÃ enhancer; to prevent afterglow in matches, in purifyingÃ sugar; as aÃ fluxÃ for soldering tin, copper, zinc and brass; and to controlÃ precipitationÃ of alkali-soluble and acid-insoluble colloidal dyes onÃ wool
DAP is the most widely used phosphate fertilizer among growers today. It is manufactured by reacting phosphoric acid and ammonia and contains two ammonia molecules. In alkaline soil conditions, one of the ammonia molecules in DAP will revert to ammonia, making it an excellent fit for low pH or alkaline soil. DAP itself is alkaline with a high pH, exceeding 7.5.