How to convert Antimony Sulfate to Sb2O3??? Hi, I have got some Antimony Sulfate and would like to convert it to Sb2O3 to be used as a refining & reducing agent in glass melt. But I am not sure if using the sulfate as such will decompose in the oxide at high temperatures (around 1200 celcius)... Any help will be highly appreciated. Is there any other reducing agent you could recommend? Thanks.