Australia's Science Forum

Hi
I found really old bottle of Manganese dioxide and it is banned at school (according to CSIS). could you please tell me what should I do with that? I don't know where did they get that from? If it's banned why they got that!! and wanted to know if you guys have this chemical at school or not?!
Thanks
lfn

Yes we have it
Manganese (IV)oxide = Manganese Dioxide is Yr7-12

Manganese(VII) Oxide = Manganese heptoxide is banded according to my hardcopy of CSIS

Oh thank you bigmack.I did a mistake ,I checked Manganese(VII) instead of IV