Definition: The term "chloroiodide" is not commonly used or defined in standard scientific terminology. Chlorine iodide (ClI2) is a chemical compound that has the formula ClI, where I is an subscript indicating it is iodine, and C is an atom with a valence of 10. In chemistry, chloride ion (Cl-) and iodide ion (I-) are the two ions that make up this compound. Chloride ion represents the negative charge on the chlorine