This little website shows you the pH of various acids, bases, food products, bodily fluids, cleaners, and more!
Here's a random substance:
pH of Mercury Dihydroxide
Chemical formula: Hg(OH)2
Also known as: mercury(II) hydroxide
Mercury Dihydroxide is Neutral
At concentration of 1 mM, it has a pH of 7.03
At concentration of 10 mM, it has a pH of 7.03
At concentration of 100 mM, it has a pH of 7.03