Anhydrous
Anhydrous (an·hy·drous)
Anhydrous (/ænˈhaɪdrəs/), derived from the Greek words 'an' meaning 'without' and 'hydor' meaning 'water', refers to a substance that contains no water or lacks water, especially water of crystallization.
Etymology
The term 'anhydrous' is derived from the Greek words 'an' (without) and 'hydor' (water). It is used in chemistry to describe a compound that lacks water or has had its water removed.
Related Terms
- Hydrate: A compound, typically a crystalline one, in which water molecules are chemically bound to another compound or an element.
- Desiccant: A hygroscopic substance used as a drying agent.
- Hygroscopic: A property of a substance to absorb moisture from the environment.
- Water of Crystallization: Water molecules that are present inside a crystal. In a hydrate, which is a specific kind of chemical compound, water is incorporated into the crystal structure.
Usage in Chemistry
In chemistry, an anhydrous compound is a substance that does not contain water, in particular, the water of crystallization. Anhydrous compounds are crucial in various chemical reactions where the presence of water can interfere with the desired outcomes.
For example, anhydrous Acetic Acid is used in the production of cellulose acetate for photographic film. Anhydrous Ammonia is used as a fertilizer to provide nitrogen to plants.
Safety Precautions
Anhydrous substances can be hazardous and require careful handling. For instance, anhydrous ammonia is corrosive and can cause burns to the skin and eyes. It is also harmful if inhaled. Therefore, it is essential to use appropriate safety measures when handling anhydrous substances.
External links
- Medical encyclopedia article on Anhydrous
- Wikipedia's article - Anhydrous
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