For reason of safe transportaion of
fruits, mangoes, bananas etc are picked
before they ripen fully. Slightly green
harvested mangoes are subjected to
small containers of calcium carbide (CaC2)
with a plastic covering. CaC2 reacts with
moisture in air to release acetylene
( or ethyne ) gas which like ehyleneis- a
chemical substance produced by fruits to
accelerate the normal preocess of fruit
maturation - is a ripening harmone.
Industrial- grade calcium carbide comtains
arsenic and phosporus and its use for
purpose ripening is illegal in many countries.