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2. Descaling agent - Wikipedia

   en.wikipedia.org/wiki/Descaling_agent

   Limescale build-up inside a pipe reduces both liquid flow and thermal conduction from the pipe, so will reduce thermal efficiency when used as a heat exchanger.. A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles.

3. Water softening - Wikipedia

   en.wikipedia.org/wiki/Water_softening

   The surface of human skin has a light charge that the soap tends to bind with, requiring more effort and a greater volume of water to remove. [4] Hard water contains calcium or magnesium ions that form insoluble salts upon reacting with soap, leaving a coating of insoluble stearates on tub and shower surfaces, commonly called soap scum. [4] [5]

4. Calcium Lime Rust - Wikipedia

   en.wikipedia.org/wiki/Calcium_Lime_Rust

   Calcium Lime Rust, more commonly known as CLR, is a household cleaning product used for dissolving stains, such as calcium, lime, and iron oxide deposits. Ingredients [ edit ]

5. Lime softening - Wikipedia

   en.wikipedia.org/wiki/Lime_softening

   Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

6. Stain removal - Wikipedia

   en.wikipedia.org/wiki/Stain_removal

   Various acids were used in the past such as Phosphoric acid as used in Calcium Lime Rust Remover (CLR) and Hydrofluoric acid as used in the Australian product made in Queensland called "Rustiban". Both of these Acids have been removed from sale to the general public due to toxicity concerns. Both of these acids were used primarily to remove rust.

7. Tetrasodium iminodisuccinate - Wikipedia

   en.wikipedia.org/wiki/Tetrasodium_iminodisuccinate

   Also most other applications of tetrasodium iminodisuccinate Na salt are based on the complexation of alkaline earth and heavy metal ions e. g. in industrial cleaners for the removal of biofilms and limescale, cosmetics, in electroplating, in construction (retardation), textile (protection against graying) and paper.