Iran's mission to the United Nations in New York and China's embassy in Washington did not immediately respond to requests for comment. China has been a major buyer of Iranian oil despite U.S. sanctions designed to choke off these exports. Washington targeted centrifuge sales to Parchin Chemical Industries (PCI), dual-use metals sales to its intermediary, P.B. Co., Ltd, which the Treasury accused of selling centrifuges and other equipment and services worth hundreds of thousands of dollars to PCI with P.B. Sadr and PCI, as well as the other companies, could not immediately be reached for comment.

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Persons: Davoud Damghani, Brian Nelson, Sadr, Zhejiang Qingji, Daphne Psaledakis, Doina Chiacu, Susan Heavey, Arshad Mohammed, David Brunnstrom, Chizu Nomiyama, Mark Heinrich Our Organizations: . Treasury, Armed Forces Logistics, Terrorism, Financial Intelligence, United Nations, Parchin Chemical Industries, PCI, Zhejiang Qingji, P.B, Treasury, Hong, Hong Kong Ke.Do International Trade Co, Qingdao Zhongrongtong Trade, Co, Thomson Locations: United States, Iran, China, Hong Kong, Beijing, U.S, Washington, Tehran, New York, . Sadr, Zhejiang, Zhejiang Qingji Ind, Sadr, Qingdao