Is it safe to use out-of-date Trione?
After the expiration date of the classic 1-part Trione, the risk of precipitate formation becomes greater with time. If you get hydrindantin precipitation in your instrument, it becomes nucleated, and will clog up easily in the future. This is very hard to clean out. Trione will still work after its expiration, but damages are not covered under warranty. You have been warned.