It's so safe you can eat it?  Not quite.  Quaker Chemical Corporation, a leading global provider of process fluids, has received H1 certification for QUAKEROL^® PCL-FG – a high performance, food grade synthetic lubricant formulated for use on pin chains in the can manufacturing process. The synthetic lubricant keeps chains deposit free by minimizing carbon build-up and provides excellent lubricity, which results in increased efficiency and reduced wear.  Refer article link for more details.