http://organs7mrbogqxhwa3yzxfynlzsskpsiogjo5aekeevcjf5cwohouaad.onion/faq.php
Depending on the specific organ, the shelf life can range from a few hours to one and a half days. According to established protocols, the donor organ should be stored in a specialized preservation solution and placed in static cold storage. The heart can be kept in this liquid for no longer than 4-6 hours, lungs - 6-8 hours, liver - 12-15 hours, and kidneys - up to a maximum of 16 hours or 24-36 hours depending on current practices.