Of the three you mention, only "cholesterol" was actually named by an early chemist [0]. "Oil of vitriol" was first mentioned by an alchemist almost 1000 years ago but the term "vitriol" already existed to refer to some metal sulfates. "Salt" is much much older.
I was really hoping we'd all be mature enough to not have this petty argument over when people studying the properties of chemicals stopped being called "alchemists" and started being called "chemists". What year was that, exactly? Exactly. I need an exact year, so I don't make this "mistake" again, please. Because otherwise, I think "early chemists" is a perfectly accurate description of early humans studying the properties of chemicals.
The transition was gradual but did happen, and on one side you had a lot of pseudo-religious beliefs and on the other you had experimentation and the scientific method.
And this distinction is important enough to you that you'd like everyone who refers to pre-20th century humans who studied the properties of chemicals as "early chemists/alchemists", and if they don't, you're going to correct them? Even if it's irrelevant to their main point? That's the discourse we want on here?
Everyone had pseudo-religious beliefs back then! Can we not talk about "early astronomers" who were studying the movements of stars and planets, if they also believed in other weird shit? Who cares if they were studying the stars in order to sacrifice goats at better times?
> you'd like everyone who refers to pre-20th century humans who studied the properties of chemicals as "early chemists/alchemists",
"Alchemist" has a specific meaning, and it is not synonymous with "early chemist". Robert Boyle was
clearly an early chemist and predates Isaac Newton, who was an alchemist. There is no temporal hard line in the sand, the distinction is made based on methodology and goals. The two terms aren't necessarily mutual exclusive (as with the astronomy / astrology distinction you allude to), but that doesn't mean you can conflate them.
> Everyone had pseudo-religious beliefs back then!
Perhaps, but that doesn't mean there aren't relevant distinctions to be made about their beliefs and methodologies.
While this distinction is important, it is also irrelevant to my main point. "Vitriol" predates that alchemist and is arguably more of a word that arose than a name that was given.
[0] https://en.wikipedia.org/wiki/Michel_Eug%C3%A8ne_Chevreul