I would not chance it.
If a stray cat that is sick, with feline distemper, has walked through it ... it is highly contagious ... you would be feeding your chin pneumonia ... feline distemper for a chinchilla is a death sentence.
If field mice have run through it, or another animal has urinated on it ... you would be feeding your chins their germs, bacteria and parasites.
If it was grown in the house and you have no other pets, I might
about it, but would probably still not do it.
That would just be taking to many chances with a chin, for me.
You might want to research the plants that grow in the Andes Mountains that chinchillas are known to eat and make them a little inside garden, so they could have it fresh. Just, please, do not use plant food or an insecticide on it.
You could grow some alfalfa or meadow grass in a pot indors for your chin ... they would love it ... and we know for sure that it is safe for them.
Jo Ann