The product is extracted from chicken gallbladder Specification: Appearance white or yellowish crystallization powder, taste bitter. Related Substance TLC Assay >95% Moisture <5.0% Blazing Residue <0.2% Specific Optical Rotation +11.0° +13.0° Melting Range: 150—160 Chemical Name: 3a, 7a –dihydroxy—5 –Cholan—24—Oic acid