Propanethial-S-oxide

By Kat Arney2019-01-30T10:41:00

Wearing a mask and snorkel to chop onions

Source: © Shutterstock

How onions make you cry

Propanethial-S-oxide is the pungent chemical in onions that brings tears to most eyes. This article explains how and examines popular methods designed to mitigate the effects – like wearing swimming goggles.

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