Angular impulse is defined as the product of torque and time for which it acts.
Mathematically,
Angular impulse = Torque X Time.
Dimensional Formula of Torque = M1L2T-2
Dimensional Formula of Time = M0L0T1
Putting these values in the given equation we get,
Dimensional Formula of Angular impulse = M1L2T-1
SI Unit of Angular impulse is Kg m2s-1