ß-glucuronidase from ocean-fresh Red Abalone, >100,000 u/ml, 10ml

2,3,3',4,4',5,5'-Heptachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Mixed Cation

4,4'-DDT 13C12, 100µg/mL in Acetone, 1ml