The cyclododecanone product of the oxidation lab because its odor induces mania. Methyl benzoate is a carcinogen. Methanolic solutions of sodium borohydride are highly caustic. Unused Tollens reagent must be destroyed because it forms an explosive precipitate on standing. In the Grignard lab flame-drying of apparatus is occuring during the same laboratory period with the use of highly flammable ether.
Acetic anhydride is a lachrymator.
Chlorosulfonic acid is highly corrosive and reacts violently with water. Acetophenone is a carcinogen. Sulfuryl chloride reacts violently with water. Potassium tert-butoxide in the dehydrohalogenation lab is highly caustic. Hydrogen gas generated for the reduction experiment is highly flammable.