Cryochemistry is the study of chemical interactions at extremely low temperatures. As such, it has overlaps with the field of condensed matter physics

Condensed matter physics

Condensed matter physics deals with the physical properties of condensed phases of matter. These properties appear when a number of atoms at the supramolecular and macromolecular scale interact strongly and adhere to each other or are otherwise highly concentrated in a system. The most familiar...

 and some relevance within the field of astrochemistry

Astrochemistry

Astrochemistry is the study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation. The discipline is an overlap of astronomy and chemistry. The word "astrochemistry" may be applied to both the Solar System and the interstellar medium...

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Cryochemistry can often be used to study compounds and reactions that are too reactive or unstable under standard laboratory conditions. An example of such a compound is Argon fluorohydride

Argon fluorohydride

Argon fluorohydride is the first known compound of the chemical element argon.-Discovery:The discovery of this first argon compound is credited to a group of Finnish scientists, led by Markku Räsänen...

a species only stable below 40K.