We can supply Alvimopan (cas: 170098-38-1) with the following specification:

Appearance   White or off-white crystal

Assay  99.0% min

Specific Rotation ([a D 25])      +51.8±1.0(C=1 in DMSO)

Water  6.8-8.0%

Sole impurity      0.5% max

Total impurity     1.0% max