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China and Germany are the leading exporters of Diphenylphosphine oxide (CAS 4559-70-0), accounting for the largest shares of global shipments in recent years, while the United States, South Korea, and Japan represent the top importing markets. Imports by the U.S. and South Korea have risen steadily since 2022, coinciding with increased demand from pharmaceutical and specialty chemical sectors, while Diphenylphosphine oxide prices have remained relatively stable amid consistent supply from major producers.
Diphenylphosphine oxide (CAS 4559-70-0) is a white to off-white crystalline solid at room temperature, typically odorless and non-volatile, with a melting point around 138–142 °C. It is classified as an organophosphorus compound and serves primarily as a chemical intermediate in organic synthesis. Its main industrial use is in the preparation of phosphine ligands—particularly chiral and functionalized derivatives—for transition-metal catalysis. It is widely employed in pharmaceutical and agrochemical synthesis, as well as in the development of specialty catalysts for cross-coupling reactions and polymerization processes.
suzuki reaction
Yellow to light orange crystals
This chemical is included in Fine Chemicals. See more about what is Diphenylphosphine Oxide and Diphenylphosphine Oxide SDS information.
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