Cobalt-Manganese Bromide (CMB) Composite Catalysts is red liquid, easily soluble in water and ethanol. It is used as PTA / PET oxidation catalyst. This catalyst is a mixed catalyst and is used in liquid form in the oxidation processes of organic compounds. Cost reduction and speed increase in the preparation and consumption of this catalyst in the relevant units as well as its low corrosion rate (250 to 600 times less) compared to the previous catalysts are special features of this catalyst.