The perception of clothes washed in fabric softener smelling like burnt matches could be attributed to a specific chemical compound present in some fabric softeners and laundry detergents. This compound is known as "sulfur compounds" or "sulfur-containing compounds." When these compounds are exposed to high heat during the drying process, they can release a distinctive smell that some people describe as similar to burnt matches or rotten eggs.
One of the common sulfur-containing compounds found in some fabric softeners is called "mercaptan." Mercaptan is also used as an odorant in natural gas to make it detectable, and it has a strong and somewhat unpleasant smell. When fabrics treated with fabric softener are exposed to high heat in the dryer, these sulfur compounds can be released into the air, giving rise to the burnt match-like odor.
It's essential to note that not everyone perceives the same smells in the same way, and individual sensitivity to certain odors can vary. Some people may not notice the burnt match smell from fabric softener-treated clothes, while others might find it quite distinct.
If you find the scent unpleasant, you could try the following to mitigate the odor:
Reduce the amount of fabric softener used: Using a smaller amount of fabric softener in the laundry might help minimize the release of sulfur compounds during the drying process.
Opt for unscented fabric softeners: Some fabric softeners are marketed as "unscented" or "fragrance-free," which means they may contain fewer or no added perfumes that could exacerbate the odor issue.
Use alternative laundry products: If the smell persists, you might consider trying different fabric softeners or laundry detergents without sulfur compounds or with different scent profiles.
Air-dry clothing: Instead of using a dryer, air-drying clothes can reduce the release of sulfur compounds and other chemical odors.
Remember that personal preferences play a significant role in how we perceive scents, so what might be unpleasant to one person may not be bothersome to another. If the smell becomes overpowering or causes discomfort, it's best to experiment with different laundry products and methods to find what works best for you.