Products sold as limonene are often just expressed orange oil. This often has an orange tint to it. Pure limonene is clear and colourless. I've used a limonene product similar to the one you describe and it was fine. The thing to do is look up the SDS/MSDS (safety data sheets). There you
should see whether there's anything else in it besides limonene. It should say something like "100% orange terpenes", for example.
100% natural doesn't necessarily mean much; strychnine and arsenic are also 100% natural. I'd be very surprised if these were in Eco Clean, of course
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli