Blue Gold Cleaner Concentrate - Gallon Recommended for Oxygen cleaning purposes. This unique cleaner is a liquid, water soluble, biodegradable concentrate used for cleaning adn degreasing parts and equipment. In addition it is frequently recommended for use in the Oxygen related community, which has a need for an effective cleaner that rinses clean and leaves little to no residue (because of the potential for explosion). Blue Gold has been tested to ASTMG72-8 and ASTM D-24076 and the testing has confirmed that with rinsing, Blue Gold is compatible with industrial oxygen use. The recommended usage is 1 part Blue Gold to 20 parts water. The cleaner is approved by ANDI International for oxygen cleaning purposes, US Divers in their Nixtrox Cleaning and Service Procedures Manual, and Atomic Titanium Regulator "Special Cleaning For Nitrox Use" instructions.