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A combination of sulfuric acid, sulfur dioxide and hydrogen sulfide.

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What chemical is in a onion that makes us cry?

Onions contain a compound called syn-propanethial-S-oxide. When an onion is cut, this compound is released and reacts with the water in our eyes to form sulfuric acid, which irritates the eyes and causes tears.


What is a good name for a science fair project about preventing onions from making you cry?

The no fears of tears expiriment!


Does the element indium cry when its bent?

Yes it gives out a cry or known as "tin cry"


What is a compound word that ends in cry?

One example of a compound word that ends in "cry" is "butterfly."


Which acid present in onion?

It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we sever this member of the lily family. The onion itself contains oil, which contains sulfur, an irritant to both our noses and to our eyes. Cutting an onion arouses a gas contained within the onion, propanethiol S-oxide, which then couples with the enzymes in the onion to emit a passive sulfur compound. When this upwardly mobile gas encounters the water produced by the tear ducts in our eyelids, it produces sulfuric acid. In response to the caustic acid, our eyes automatically blink, and produce tears which irrigate the eye, and which flush out the sulfuric acid. Another reflex to rid the eyes of a foreign substance, that of rubbing our eyes with our hands, often exacerbates the situation, because our hands are coated with the caustic, sulfuric acid producing oil from cutting the onion, which we then rub directly into our eyes. Much to our chagrin, the only remedy for ridding the onion of its pungent, irritating oil is to boil it, not to slice it or dice it.

Related Questions

Why do purple onions make us cry?

It's not just purple onions. There is a chemical inside of onions that, when you slice an onion, are released into the air. This causes a slight chemical reaction in your eyes, causing a burning sensation. To combat the burning, your eyes tear, causing you to "cry."


What enzyme is in onions that makes you cry?

allinases


What happens when you chill onions?

Chilling onions can help reduce the release of the compound responsible for making you cry when cutting onions. It can also slow down the enzymatic reactions that cause onions to spoil, therefore extending their shelf life.


Who found out that cutting onions makes you cry?

some random guy


What in the onion makes it have a strong taste?

Onions have a high acid content and this makes them strong in flavor and makes you cry when cutting them.


How do onions cry?

they don't cry


What type of onions make us cry?

White, yellow, and red onions are much more likely to make us cry than green onions. Onions make us tear up because of a reaction in the vegetable that occurs as we break into it, which causes the release of a chemical called lachrymatory factor, which then irritates our eyes.


What percent of people cry when they cut onions?

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


Will you not cry if you chew gum while cutting onions?

it is true that if you chew gum while cutting onions you will not cry


Why do we hate onions?

This is because your taste buds may not agree and say this it yummy to your brain. Also, since we must smell to taste, and onions give off a chemical (this is why they make us cry), so maybe your taste sorting part of your mind doesn't agree with this. Do you notice that you cry often when chopping onions. I however enjoy sweet onions. You friend,


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.


Can Chuck Norris be invisable?

Chuck Norris (AKA god) Is all around you. Chuck Norris makes onions cry.