Biological preserved specimens: What are the rules for storing and/or disposing of biological preserved specimens?

Biological preserved specimens: What are the rules for storing and/or disposing of biological preserved specimens?
Chemicals in schools (formaldehyde, melamine and cyanuric acid): Can someone please tell me if we can use formaldehyde (37%), melamine or cyanuric acid for IB individual design experiments in schoo
Preserving sheep brains without formalin.