1D-myo-inositol 1,2-cyclic phosphate is a myo-inositol cyclic phosphate that is the 1,2-cyclic phosphate derivative of 1D-myo-inositol. It has a role as an epitope. It is functionally related to a myo-inositol. It is a conjugate acid of a 1D-myo-inositol 1,2-cyclic phosphate(1-).