Enables arylsulfatase activity. Involved in several processes, including response to estrogen; response to ethanol; and response to methylmercury. Located in cytoplasmic vesicle; extracellular space; and lysosome. Is extrinsic component of external side of plasma membrane. Used to study hypothyroidism. Human ortholog(s) of this gene implicated in metachromatic leukodystrophy. Orthologous to human ARSA (arylsulfatase A). [provided by Alliance of Genome Resources, Apr 2022]