date:Dec 03, 2018
Chopping onions often leave tears rolling down our cheeks. The tears come because our eyes are irritated by droplets the onion releases. It turns out when you cut an onion, it releases a gas called syn-Propanethial-S-oxide. These gases then get to your eyes and create a mild acid which irritates the eyes.
However, rubbing your eyes is a bad idea, since your hands are likely full of the tear making onion juice. The eyes tear up to protect themselves. Five ways to cut onions without shedding tear