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The acidic chemicals in the onion are released when slicing through its tissue, rise in the air along with heat and irritate your eyes by being absorbed through the cornea. Use a fan to blow the molecules away from your eyes to avoid irritation. Onions produce the chemical irritant known as syn-propanethial-S-oxide. It stimulates the eyes' lachrymal glands so they release tears. Scientists used to blame the enzyme allinase for the instability of substances in a cut onion.

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9y ago

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12y ago

Because your jealous of someone. If you are jelous than get over it. If your not jealous than your eyes are weak.

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Wiki User

16y ago

Its the chemicals is the onion that sting your eyes.

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Wiki User

12y ago

Onions contain a chemical, syn-propanethial-S-oxide, which irritates eyes. The eye will try to wash away the irritant with tears.

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Q: Why do onions make people cry when they cut them?
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Related questions

What percent of people cry when they cut onions?

i think near about 70% people are cry when they cut onions including me.


Do onions make people sad?

No they do not make people sad but they can make people cry - or at least seem to be crying because they irritate the eyes of many people when they cut them up.


Do red onions make you cry most?

no they dont make you cry the purple onion is sweet so you dont have to chill them


Why do onions make you cry, according to Wikipedia?

Onions make you cry because they release a gas called syn-propanethial-S-oxide when cut, which irritates the eyes and triggers tears as a natural defense mechanism.


Which vegetable cry us when you cut us?

Onions.


What part of a onion makes you cry?

All onions make you cry, because when you cut them, the enzymes inside combine to make a gas that wafts up from the onion. When the gas touches the water in your eyes, it forms sulfuric acid, which is what makes your eyes cry in order to wash the irritant away. You can avoid this by cutting the onion under water, or chilling it.


You'll cry if you cut this but only if the propanethial-S-oxide finds its way to your eyes What food is this?

Onions


Does wearing contacts prevent crying when cutting onions?

No. There is no research that says that cutting onions is good for your eyes. Cutting onions releases thiopropanol sulfoxide which, when it hits your eyes, creates a small amount of sulfuric acid. This is why your eyes burn and you cry when you cut onions.


Why do onions cry?

Onions contain sulfur compounds (which also give them their characteristic smell). The compounds are gases and are released when onions are cut. These gases react with the water in the tears in the eyes to form other acidic compounds which irritate the eye and cause crying.


How do get cut in Pokemon dark cry?

There is NO DARK CRY. There is only a Darkrai. So yeah. You can't get 'cut in Pokemon dark cry'.


Why do people cry when they chop unions?

because of the odor and fumes coming of of it when you start to cut into it.


What is the easy way to peel onions?

The easiest way to peel onions is to cut off the top and bottom, make a vertical slit in the skin, and then peel it off layer by layer.