This ferrocene derivative, also known as 1,1'-ferrocenebis(diphenylphosphine), presents as a yellow to deep yellow red crystalline powder. It is known to be soluble in pyridine and insoluble in water. Store in a cool and dark place at refrigerated temperatures. 1,1'-Bis(diphenylphosphino)ferrocene is incompatible with oxidizing agents and should not be stored or handled in their vicinity. This chemical is harmful if swallowed, in contact with skin or if inhaled.