Yes just .1% - or 10g per 10,000g. (Shall we revisit the math thread? )I still use it to treat my home-rendered lard and tallow, as well any containers of soft oils that I open. While it is expensive, the amount used is so minuscule per batch (literally a drop or two) that a very small bottle of ROE lasts a very long time.
I use it too. I have purchased from Camden Grey and more recently from SVA although this kind is darker.