[Histonet] Periodic acid vs environment

[Cristina Nunes]

Dear all,
I have been trying for the first time the PAS staining and have a
"practical" problem. How harmful is the periodic acid for the
environment? Is it something you may throw out without any harm or do I
need to store it for a specialised discard?
I hope it is not a very silly question and many thanks for your help.
Best regards,
Cristina Nunes.