Thank you for providing this. Now can you provide the percentage of sulfuric acid?
Now that I took the time read your post,please afford the same courtesy and reread mine.
I'll add the label, which does not denote any content of sulfuric acid.
I'll preface with I am not a chemist nor have I worked the formulas in 20 years since college chem. But I vaguely recall that sulfonic acid is created by the sulfonation of sulfuric acid and an alkylbenzene (probably Aliphatic dihydric alcohol as its listed).
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Continuing down the road of off topic...
I wouldn't eat or bathe in Lye (sodium hydroxide) but it's used in the soap I use and the olives I eat. Point being, toxic or harmful components are used in all sorts of everyday items. Their process of manufacturing may use toxic components but the resulting products are not by default toxic. Many wild mushrooms are mildly toxic raw but safe(ish) when cooked. Rhubarb, potatoes, taro and cassava are potentially toxic when raw but cooking (processing) makes them safe.
Tl:dr - no actual sulfuric acid (at least not in H2SO4 form) in StarSan. Use it or not, I could care less. Just make an informed decision with fact-based evidence.