d4 C27 alpha alpha alpha (20R)-Cholestane Back Catalog number: 0975.27-10-IOX10 Manufacturer: CHIRON AS Availability: 3 weeks Price on request - + Recommended 53120 EPA Method 353.2 Nitrate + Nitrite Price on request 50765 5.% Ammonium hydroxide Price on request 11701.12-100-IO 2,3',4',5-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request