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Calcium chloride (CaCl2) is a chemical compound
composed of calcium and chlorine ions. Here are some details about calcium
chloride, including its Chemical Abstracts Service (CAS) number:
1. Chemical Structure: Calcium chloride is an ionic compound consisting of one calcium ion (Ca^2+) and two chloride ions (Cl^-) per formula unit (CaCl2). It is a salt that forms colorless, crystalline solid at room temperature.
2. CAS Number: The CAS number for calcium chloride is 10043-52-4.
3. Physical Properties:
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Appearance: Calcium chloride typically exists as a white or colorless solid.
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Solubility: It is highly soluble in water, with a solubility of approximately
74 grams per 100 milliliters of water at room temperature.
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Hygroscopicity: Calcium chloride is hygroscopic, meaning it readily absorbs moisture
from the air. This property makes it useful as a desiccant or drying agent.
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Melting and Boiling Points: Calcium chloride has a high melting point of about
772°C (1422°F) and boils at approximately 1600°C (2912°F).
4. Uses:
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Deicing Agent: Calcium chloride is commonly used as a deicing agent to melt ice
and snow on roads, highways, and sidewalks during winter months.
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Desiccant: Due to its hygroscopic nature, calcium chloride is employed as a
drying agent in various industrial processes, such as drying gases and
solvents.
- Food
Additive: It is used as a food additive (E509) for various purposes, including
as a firming agent, stabilizer, and sequestrant.
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Concrete Accelerator: Calcium chloride is added to concrete mixtures to
accelerate the setting and hardening process, particularly in cold weather
conditions.
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Refrigerant: In some applications, calcium chloride solutions are used as
brines for refrigeration and air conditioning systems.
5. Health and Safety:
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Calcium chloride is generally recognized as safe (GRAS) when used in accordance
with good manufacturing practices in food applications.
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Ingestion of large amounts of calcium chloride can cause gastrointestinal
irritation and may lead to vomiting and diarrhea.
- Eye
and skin contact with solid calcium chloride or concentrated solutions can
cause irritation or burns. Protective equipment should be worn when handling
it.
Overall, calcium chloride is a versatile compound with a wide range of industrial, commercial, and domestic applications due to its hygroscopic properties, deicing capabilities, and other unique characteristics.
If you need further information or have specific questions, feel free to ask!
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