This is a new one for me. Making a sandwich for lunch and suddenly the kitchen smells like an open container of gasoline. Looked around and found nothing until I smelled the bread.
Gemini said
That is definitely not the aroma you want from your morning toast. While it sounds alarming, there is actually a scientific explanation for why bread—especially whole wheat—can develop a chemical or "gasoline-like" smell as it ages.
Here are the most likely culprits:
1. Lipid Oxidation (Rancid Fats)
Whole wheat bread contains the
germ and
bran of the wheat kernel, which are rich in natural oils. White bread strips these away, but in whole wheat, those oils remain.
- The Reaction: Over two weeks, exposure to oxygen and light causes these polyunsaturated fats to break down.
- The Result: This process, called oxidative rancidity, produces volatile compounds (like hexanal) that many people describe as smelling like paint thinner, gasoline, or old play-dough.
Of course I ate a sandwich with this loaf earlier in the week and didn't notice the smell, but as soon as my wife came downstairs she asked me what type of chemicals I was using in the basement. I hadn't used any any we just forgot about it.
Did try to see if it would burst into flames today, but no such luck.