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

4-Methylphthalic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 4316-23-8

GC-IRMS Standards (C15 (?13C: -30.22); C20 (?13C: -33.06); C25 (?13C: -28.21)), 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no.

Pentachloroethane