beta-Endosulfan-d4 (1,1,5,5-d4),100 µg/mL,n-nonane,1mL,

pH 4.0 Standard @ 25°C

2,5-Dimethyltetrahydrofuran, 100µg/mL, Solvent-, Unit 1mL, # of units-1, Cas.no. 1003-38-9

Acetonitrile