- produce sodium carbonate; calcium salts

- make numerous organic products such as propylene oxide or glycerine;

- calcium carbide, which is used to produce acetylene;

- produce glues and gelatines in a traditional way from abattoir waste;

- to tan skins;

- condition drilling sludge in petrochemistry

- and so many others

Limestone is an important filler for strengthening the latex back of rugs and carpets.

The rubber industry also uses calcium carbonate (as a filler), quicklime (dehydrating agent) and hydrated lime (accelerating agent for the vulcanisation process).

Micronised calcium carbonate is used as a slightly abrasive element and as a filler in many types of plastics.