Enables acid phosphatase activity. Acts upstream of or within several processes, including bone resorption; negative regulation of cytokine production; and response to bacterium. Located in lysosome. Is expressed in several structures, including alimentary system; limb; liver; skeleton; and skin. Orthologous to human ACP5 (acid phosphatase 5, tartrate resistant). [provided by Alliance of Genome Resources, Apr 2022]