CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY
Liquid nitrogen. Liquid nitrogen being poured from a flask. This fluid is widely used as a coolant in low-temperature research & for storing biological samples. The vapour around the mouth of the flask is made of water droplets condensed from the air by the extremely low temperature. Liquid nitrogen boils at a temperature of -195.8 degrees celsius. About 78% of the Earth's atmosphere is nitrogen. Nitrogen is fairly unreactive at room temperatures but can be used to make ammonia, cyanides, calcium cyanamide and nitrogen oxides.
Model release not required. Property release not required.