N'ime ụlọ ọrụ kemịkalụ, a na-eji ngwaahịa nzacha na-enyocha mmepụta nke akụrụngwa kemịkalụ, intermediates na ngwaahịa, dị ka akụrụngwa mmeghachi omume organic, ọgwụ kemịkalụ kemịkalụ, intermediates ọgwụ a nụchara anụcha, irighiri ihe na reactants na ihe na-akpali akpali, ịdị ọcha nke ihe mgbaze organic na mwepụ nke ihe mkpali eji na ụfọdụ mmeghachi omume kemịkal.