Salts of oxometallic or peroxometallic acids

284130 Salts; sodium dichromate 284150 Salts; chromates, dichromates, peroxochromates; n.e.c. in heading no. 2841 284161 Salts; of oxometallic or peroxometallic acids, manganites, manganates and permanganates, potassium permanganate 284169 Salts; of oxometallic or peroxometallic acids, manganites, manganates and permanganates, other than potassium permanganate 284170 Salts; molybdates 284180 Salts; tungstates (wolframates) 284190 Salts of oxometallic or peroxometallic acids; n.e.c. in heading no. 2841