Tetraethyltin, 1000 µg/ml, Methanol, 5ml

Formaldehyde-DNPH Level 2 (0.5ug/mL)

Malathion, 100 µg/ml, Ethyl acetate, 5ml

1,2,4-Trichlorobenzene, 10 µg/ml, Cyclohexane, 1