Molecular formula:SeO2 red-white or shiny needle crystal powder, irritating smell. Mol

Quality standard	Premium grade
SeO2(%)	99.7
Insoluble(%)	0.00033
Burning residue(%)	0.0010
Pb(%)	0.028
Cd(%)	Trace
Hg(%)	Trace
Fe(%)	0.034
As(%)	0.0096

Selenium dioxide