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 Magnesium Hydroxide
Chemical formula: Mg(OH)2
Also known as: Milk of magnesia
Magnesium Hydroxide is Basic
At concentration of 1 mM, it has a pH of 10.4
At concentration of 10 mM, it has a pH of 10.4
At concentration of 100 mM, it has a pH of 10.4