👉 Subalkaline is a term used in chemistry and biochemistry to describe a substance that has a pH value of 2.5 or lower, making it more acidic than basic substances like water. This means that the concentration of hydrogen ions (H+) in the solution is greater than 10^-7 mol/L, which can be considered "sub-alkaline." It is often used to describe solutions with a pH value below 2.5.
