noun

A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.

traces of acid

adjective

Containing acid or having the properties of an acid; having a pH of less than 7.

poor, acid soils

caustic,corroding,eroding,erosive,abrasive,biting,mordant,burning,stinging