What is carried in tank cars? - Trains Magazine

There are probably several thousand commodities that are shipped in tank cars.  Pretty much any feedstock, chemical, or product that is or could be a liquid, could be suspened in a liquid or shipped as a compressed or liquified gas could be in a tank car.

Fats, edible oils, syrups and alcohols.

Inedible oils and fats,lubricants

Fertilizers, latex, synthetic rubbers

Combustible and flammable liquids.

Flammable gases.

Non-flammable gases.

Oxidizers

Acids.and caustics

Sulphur and slurries

Liquid wastes

Toxic and poisonous chemicals and substances

Chemicals made from any of the above

Fuels, fuel additives and petrochemicals