3 ms·> Also salt isn't dark AFAIK. Table salt, no - manganese dioxide, yes.by e12e 4y ago> Also salt isn't dark AFAIK. Table salt, no - manganese dioxide, yes.zafka 4y agoOf course Manganese dioxide is not a salt.e12e 4y agoAh, that's odd - I mixed up with potassium permanganate.