Chloroheptamethylcyclotetrasiloxane is an intermediate in the synthesis of Heptamethylcyclotetrasiloxan-2-ol (H281305). Heptamethylcyclotetrasiloxan-2-ol is a derivative of Octamethylcyclotetrasiloxane (O237145), which is an organometallic reagent that can be used in the preparation of siloxane polymers, with high surface-hydrophobicity restoration.