Lime

(in 1,146 products)

1. Acidity Regulator / Buffering Agent - Changes or maintains the acidity or basicity of food/cosmetics.

Calcium oxide is an odorless, white or gray-white solid in the form of hard lumps. It is commonly known as quicklime or burnt lime.

Calcium hydroxide has a number of uses in building and paving materials. It is found in mortar, plasters, and cements. When used in mortar, calcium hydroxide is mixed with sand and water to make a paste. The paste is put between bricks to hold them together. When water in the paste evaporates, the remaining sand-calcium hydroxide mixture becomes a hard, strong adhesive holding the bricks together.

Calcium hydroxide is also used extensively as a neutralizing agent. As a base, it reacts with acids formed in industrial operations, in the environment, and in other situations. For example, soil that is too acidic for plants to grow properly can be treated with calcium hydroxide. The hydroxide ion (OH−)in the calcium hydroxide reacts with the hydrogen ion (H+) in the acidic soil to form water, resulting in a more neutral soil. A similar application involves the treatment of exhaust gases from factories with calcium hydroxide. Nitrogen and sulfur oxides in the gases, which are the primary cause of acid rain, are neutralized when passed through "scrubbers" containing calcium hydroxide.

As a food additive (E number 529), calcium hydroxide is used for the purpose of preventing foods from becoming too acidic. It is approved to use as food additive in EU and generally recognized as safe food substance in US.

1. PubChem: https://pubchem.ncbi.nlm.nih.gov/compound/14778

1. EU Approved Food Additive [2018]

- E529

2. Japan’s List of Designated Food Additives under Article 10 of the Food Sanitation Act

- Calcium Oxide

3. Canada List of Permitted Food Additives

- List 8 - Calcium Oxide

4. US FDA Generally Recognized As Safe (GRAS) Food Substances (21 CFR 184) [2017]

- § 184.1210 - Calcium oxide