Formaldehyde (5 ppm)

Imbentin-N/040 (n = 1-7) 100mg S-4098 Nonylphenol with 4mol ethyleneoxide

13C6-Diclofenac sodium hydrate, 10mg

1,3,7,8-Tetrabromodibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene