Proton-activated chloride channel that mediates import of chloride ion in response to extracellular acidic pH (PubMed:31023925, PubMed:31318332). Involved in acidosis-induced cell death by mediating chloride influx and subsequent cell swelling (PubMed:31023925, PubMed:31318332). Widely expressed, with highest expression in brain. N-glycosylated. Belongs to the proton-activated chloride channel family.