1,2:3,4-Diepoxybutane

2,4'-DDE-d8 (dichloropropyl-d4), 100µg/mL in AL, 1ml

2,3,4,4',6-Pentachlorobiphenyl ,100 µg/mL,isooctane,1mL,

ASTM D1387-90 Column Resolution Test Standard