Vinegar is diluted acetic acid. If you just go buy “vinegar” at the grocery store, you’re buying an aqueous solution that is almost always 5% acetic acid.
Ah, but here’s an intriguing product. Meet Heinz Cleaning Vinegar—in “special cleaning strength.”
Vinegar is indeed a good cleaner for many things. A stronger vinegar could be useful indeed. So what is “special cleaning strength”? Is it 15%? Maybe 20%? Maybe more?
Turns out “special cleaning strength” is a whopping 6% acetic acid.
Wow. Don’t you love how it’s made from “sun-ripened grain,” too? Oh, and thanks for the reassurance that it’s “safe for cooking.” (As if 5% is perfectly fine, but 6% will melt your esophagus.)
Here’s a tip, dudes and dolls: to make your own “special cleaning strength” vinegar, just leave a pan of store-brand vinegar in a sunny window for a few hours.