GFAA Mix Back Catalog number: 50103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 56127 Cobalt (Co) Price on request 92266 Cholesterol & Coprostanol Price on request 11697.12-100-IO 2,3,4,6-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request