What is the reasons for using activated carbon during crystallization? Why is recommended to use little and not a lot during crystallization?

Answer 1

From Google:
What is the reason for using activated charcoal during crystallization?
Activated charcoal is sometimes used to remove small amounts of colored impurities from solution. Activated charcoal has a high affinity for conjugated compounds, whose flat structures wedge themselves well between the graphene sheets.Aug 3, 2021