Potassium (K) Back Catalog number: 54158 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 66189 2,3,3',4,4',5,5'-Heptachlorobiphenyl (189) Price on request AXCL11DP exo-anti-Cl11-Dechlorane Plus®, 1.2ml x 50ug/ml, toluene Price on request 58057 Lanthanum (La) Price on request