CAS# 918870-76-5. 100mg. 1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene[2-(i-propoxy)-5-(N,N-dimethylaminosulfonyl)phenyl]methyleneruthenium (II) dichloride, Zhan Catalyst-1B, min 96%. MFCD08459353. Molecular Weight: 733.75. Molecular Formula: RuCl2[C21H26N2][C12H17NO3S]. Color/form: green solid Strem# 44-0082. http://www.strem.com/catalog/v/44-0082/