Rev. 2 code 20.52 is one of multiple older codes associated with Rev. 2.1 class 20.59 Manufacture of other chemical products n.e.c..
Potential impact
Datasets, CRM segments, KYC rules, reporting logic, and historical joins may need review because the activity scope is not a simple unchanged carry-over.
What to check next
Review the official explanatory notes for each target code and confirm whether the business activity still fits the suggested Rev. 2.1 class.