What is the difference between toxic and non-toxic ingredients? The difference is definitely meaningful and to be perfectly honest, you should only use non-toxic cleaning products.
A toxic ingredient takes a really long time to break down in the environment. For example, if your toilet cleaner contains toxic ingredients then once it is flushed down the toilet it will not degrade quickly and can last in the environment for hundreds of years, if not longer.
I am going to research labeling requirements around toxicity and write a post about that in the future but for now, do your best to stick to non-toxic cleaners. These products break down into harmless components once they are used.