Main origin
Calcium oxide and calcium hydroxide are used in similar industries and applications: Use as raw material in the preparation of chlorinated lime, bleaching powder, and calcium salts. Also used as a binding agent for the manufacture of several products such as cement, and other building and paving materials. Used for water treatment and for the treatment of waste effluents from different industries. Used as a scrubbing and neutralizing agents in the chemical and petrochemical industry. Large volumes of calcium oxide and calcium hydroxide are generated in combustion processes and can be found in the leftover ash. Involved in different operations in the following industries: iron and steel manufacturing (as well as other metals), ammonia synthesis, metal ores refining, manufacture of fine chemicals (e.g. pharmaceuticals, lubricants), pulp and paper industry, leather manufacturing, etc.
Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.