Cyclohexylammonium iodide | CAS 45492-87-3 SKU MS100840 Cyclohexylammonium iodide (CHAI; CAS Number: 45492-87-3) is a cyclic aliphatic ammonium halide salt used as a perovskite precursor in the preparation of perovskite solar cells (Jeong et al., 2021). Use Greatcell Solar Materials’ high purity Cyclohexylammonium iodide for consistent results and optimal performance.