When a patient is waiting for a potentially life-saving blood or tissue donation, time and temperature take on a whole new level of importance. At Praxair, we will provide you with the cryogenic gases you need to preserve healthy tissues, organs and blood supplies. Our nitrogen and liquid nitrogen gases are used to freeze and preserve blood, tissue, and other biological specimens to keep them fresh and viable during delivery to those who need it most. Your patients are putting their lives in your hands. Let us put the right gases and liquids into yours.