Non-toxic and biodegradable, but still requiring full PPE for use and with strict environment containment guidelines...

Those two don't fit each other.

But anyway, looks like it's an oil so all the complaints about it being hard to use will be there.

I’m guessing it has to do with concentration. Like d-Limonene is a fantastic, natural, biodegradable degreaser… but you need PPE to work with it in any prolonged way.

You shouldn't interest it, and it will degrade... Still plenty other potential ways it can be bad for you...

Could cause skin irritation.. be highly acidic/basic, could react with skin oil or moisture... Or could be lawyer required CYA just in case.