What is the use of calcium carbide in fruit?

The use of calcium carbide in fruit

Ripening is the process that makes the fruit tastier. Generally, the fruit becomes sweeter, less green (usually "red") and softer as it ripens.

Arrival agents accelerate arrival. An important ripening factor is ethylene, a gaseous hormone produced by many plants. Many synthetic analogues of ethylene are available. Many fruits can be harvested before reaching full maturity. It is useful if the mature fruit is not transported well. For example, bananas are harvested while still green and artificially ripened by exposure to ethylene after shipping.

Calcium carbide is also used in some countries for artificial fruit ripening. When calcium carbide comes into contact with moisture, it produces acetylene gas, which has a similar effect to ethylene, a natural ripening agent. Acetylene accelerates the ripening process. Catalytic generators are used for easy and safe production of ethylene gas. An ethylene sensor can be used to accurately control the amount of gas. Covered bowls or bags are commercially available for ripening fruit. These containers increase the amount of ethylene gas and carbon dioxide around the fruit and cause the fruit to ripen.

A ripening indicator such as iodine (I) can be used to determine whether the fruit is ripe or rotten by showing whether the starch in the fruit has been converted to sugar. For example, if you put a drop of iodine on a slightly rotten part of an apple (not the skin), it will remain yellow or orange due to the loss of starch. If the iodine is consumed and it takes 2-3 seconds for it to turn dark blue or black, the ripening process has started but is not yet complete. If the iodine turns black quickly, most of the starch is still present in high concentration in the sample and the fruit is not fully ripe.