... powder, insoluble in water, soluble in hot and concentrated strong acid and alkali, having the good chemical stability; It ... be used to make spongy titanium, alloy of titanium and iron and hard alloy, etc. 4) It can also ... , plastic, rubber, printing, dying, cosmetics, medicine fillings and food additives.Used:Mainly used in papermaking.rubber.enamel.painting ... of acid, %0.5max 0.5 max nano tio2