Yes, it's fired such that it's very stable over time. I've got mix that's four years old and the clay portion is still as it was when fresh out of the bag.
I've done a bit of googling on what it is about zeolite that makes it absorb ammonia. From what I've gathered, it's the aluminium silicate that makes it work, and aluminium silicate is a clay mineral. Zeolite is hydrated though, and I don't know whether the pinkish litter clay is or if that even makes a difference.
Either way, it should be easy to test. I found a cat litter experiment that measured the ammonia using pH strips, and while I don't have any of those I do have a steady supply of red onion.
I've done a bit of googling on what it is about zeolite that makes it absorb ammonia. From what I've gathered, it's the aluminium silicate that makes it work, and aluminium silicate is a clay mineral. Zeolite is hydrated though, and I don't know whether the pinkish litter clay is or if that even makes a difference.
Either way, it should be easy to test. I found a cat litter experiment that measured the ammonia using pH strips, and while I don't have any of those I do have a steady supply of red onion.