Park Tool Bio ChainBrite Cleaner: 16 oz. (474 mL)

Bio ChainBrite™ Bicycle Chain and Component Cleaning Fluid is a 100% biodegradable, natural, plant-based degreaser formulated for use in the CM-5.2 Cyclone Chain Scrubber, CM-25 Professional Chain Scrubber, or as a general purpose degreaser. Won't harm alloy, plastic, or rubber parts.
Use CB-4 full strength, do not dilute with water. Cover parts in solvent and scrub using a brush.