Is synonymous that has a core subset with the Tornado Cash smart contracts: the Tornado Cash pools. The vast majority of those contracts are immutable. That is definitely, they've no capability to be up-to-date or removed by anybody. A whole list of sanctioned, immutable Tornado Cash pools can be found https://in3mastermind.com/tornado-cash-explained-how-it-ensures-unmatched-confidentiality-on-ethereum-and-bnb/