LEPC 101: Liquified Compressed Gases - Why is white not always light?
A common property of liquefied compressed gases is that they have low boiling points. When these gases boil, they change state from liquid to vapor, and you may see a visible cloud. Due to their extremely cold temperatures, the product is freezing the air from the low boiling point and absorbing heat.
Article By: David Binder, Director Quality, Safety & Regulatory Affairs; ASERT Training Director, Tanner Industries, Inc.