How do onions make us cry?

How do onions make us cry?




How do onions make us cry?


  Ever cutting an onion has made you cry? But do you know how do they make you cry? Let's see...

Why do onions make us cry?

  Onions are made up of onion cells. When we cut an onion, millions of onion cells rupture. Thus, they release acidic chemicals called as amino acid sulfoxides and some sort of special enzymes. These released chemicals react with each other to form syn-Propanethial-S-oxide (C3H6OS). It is also a sulphur compound that stinks, just like most of other sulphur compounds. This is the reason behind onion's smell. This chemical formed is volatile (it easily turns into gas). When this substance reaches our eyes, it reacts with the liquid that keeps our eyes lubricated to form mild sulphuric acid. This gives us a burning sensation. In order to wash off the acid, our lacrimal glands produce disinfecting tears.

  Thus onions make us cry. To know more about why do we cry, click here.

  To know how to cut onions without crying, click here.
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