[align=left]50-00-0 Formaldehyde
50-29-3 DDT (Dichlorodiphenyltrichloroethane)
50-32-8 Benzo[a]pyrene
50-78-2 Acetylsalicylic acid (Aspirin)
52-68-6 Trichlorphon
54-11-5 Nicotine
55-38-9 Fenthion
55-63-0 Nitroglycerin
56-23-5 Carbon tetrachloride (Tetrachloromethane)
[align=left]56-38-2 Par
