By education, I am an engineer. In the professional of chemical engineering, specifically petrochemical or petroleum engineering, unit operations called “catalytic crackers” exist. These “crack” larger molecules into smaller ones. As an example, octane (nC8) can be crackt into propane (nC4) if desired.
All occupations have their own language, whether cryptolect or just technolect. In mine, these are termed “crackers” (definition 5), with sometimes unfortunate effects.