Amazon.com: Park Tool CG-2.4 Bicycle Chain and Drivetrain …

CB-4 Bio ChainBrite Park Tool Bio ChainBrite Bicycle Chain and Component Cleaning Fluid is a 100% biodegradable, natural, plant-based degreaser formulated for use in the CM-5.3 Cyclone Chain Scrubber, or with a scrubbing brush as a general purpose degreaser.When used with a chain cleaner, CB-4 gets bicycle chains clean inside and out so they’re good as new.

https://www.amazon.com/Park-Tool-CG-2-4-Bicycle-Cleaning/dp/B07Z8JH85V