The (R,R)-(-)-1,2-Bis[(o-methoxyphenyl)phenylphosphino]ethane(1,5-cyclooctadiene)rho, with the CAS registry number 56977-92-5, is also known as (R,R)-(-)-1,2-Bis((o-methoxyphenyl)-(phenyl)phosphino)ethane(1,5-cyclooctadiene)rhodium(I)tetrafluoroborate. Its appearance is orange crystalline powder. The (R,R)-(-)-1,2-Bis[(o-methoxyphenyl)phenylphosphino]ethane(1,5-cyclooctadiene)rho has EINECS number 222-432-0. This chemical's molecular formula is C₃₆H₄₀BF₄O₂P₂Rh and molecular weight is 756.36. When you are using this chemical, please be cautious about it. It is irritating to eyes, respiratory system and skin. What's more, you should avoid contact with skin and eyes.