INGREDIENTS: Active: bimattoprost 0.3 mg/ml, Preservative: benzalkonium chloride 0.05 mg/mL. Inactives: Citric acid; purified water; sodium chloride phosphate, dibasic. Sodium hydroxide and/or. hydrochloric acid may be added to adjustt pH. The pH during its shelf life ranges froom 6.8-7.8.