Each mL of Tuberculin PPD RT23 2 TU contains Mycobacterium tuberculosis 0.4 mcg, disodium phosphate dihydrate 7.6 mg, potassium dihydrogen phosphate 1.45 mg, sodium chloride 4.8 mg, potassium dihydroxyquinoline sulphate 100 mcg, polysorbate 80 50 mcg, water for injection 1 mL.