Chem Explorers

Unlocking the Versatile Power of Calcium Nitrite: Properties Uses and Safety

Calcium Nitrite is a chemical compound that has gained significant attention in recent times due to its unique properties. This compound is an odorless and colorless crystalline substance that dissolves readily in water.

Calcium Nitrite has various industrial and commercial applications, making it an essential component in numerous products. In this article, we will discuss Calcium Nitrite in detail, including its definition, properties, identification, and uses.

We aim to provide the readers with comprehensive knowledge about this inorganic compound to aid laboratory technicians, chemists, and individuals who require this chemical for their industrial or commercial purposes.

Definition and Properties of Calcium Nitrite

Calcium Nitrite (Ca(NO2)2) is a salt compound that has a molecular weight of 132.087 g/mol. It is an inorganic chemical that is produced through the reaction of Calcium Hydroxide, or slaked lime, with Nitric acid.

Calcium Nitrite has a molar mass of 132.10 g/mol, and its density is 2.5 g/cm3. It has a melting point of approximately 243C and a boiling point of 340C.

Calcium Nitrite is a stable and non-combustible compound that is not considered to be a hazardous material. The compound is slightly hygroscopic, meaning that it tends to attract and absorb water molecules from the surrounding environment, converting into a hydrated form.

Calcium Nitrite is insoluble in most organic solvents but is freely soluble in water. It has a neutral pH level that ranges from 7.0 to 8.0, making it a useful buffering agent in chemical reactions.

Identification of Calcium Nitrite

The identification of Calcium Nitrite involves its unique identification number, which is assigned by various official organizations. The CAS number of Calcium Nitrite is 13780-06-8, which stands for Chemical Abstracts Service registry number.

The PubChem CID is 26004, while the EC number is 237-030-0. The CAS number is an identification code assigned by the Chemical Abstracts Service to specific chemical compounds worldwide.

The CAS number enables the rapid and straightforward identification of a particular chemical and provides significant information about the chemical properties and hazards. The PubChem CID (Compound Identification) is a unique number assigned to every compound present in the PubChem database.

It enables the direct and straightforward identification of the chemical and aids in understanding its characteristics, uses, and toxicity. The EC number is a classification system used in the European Union that identifies and tracks chemical substances.

The EC number is also known as the EINECS (European Inventory of Existing Commercial Chemical Substances) number and is used to ensure that only safe chemicals are used in various processes.

Uses of Calcium Nitrite

Calcium Nitrite has various uses in industrial and commercial applications. One of its primary uses is as a corrosion inhibitor, making it a useful additive in the production of concrete structures.

Calcium Nitrite has a unique ability to prevent the corrosion of reinforcement steel in concrete, extending the lifespan of the structure. The compound is also used as a curing agent in meat and fish products to prevent browning or discoloration during packaging and storage.

It is also added to several types of fertilizers to improve soil quality and mitigate nitrate leaching into the environment. Calcium Nitrite is also used in the manufacturing of dyes and pigments, as an oxygen scavenger in boilers, and as an important intermediate in the production process of nitrous gases.

Conclusion

Overall, Calcium Nitrite is a highly versatile compound with numerous industrial, commercial, and agricultural applications. Its unique properties and ability to prevent the corrosion of steel make it an essential chemical in the construction industry.

Furthermore, its uses in the food and agricultural sector make it a critical component in ensuring the safety and quality of various products. Laboratory technicians, chemists, and individuals in various industrial fields must understand the properties, identification, and uses of Calcium Nitrite.

This knowledge will enable them to use the compound safely and effectively in their processes, preventing harm to the environment and individuals’ health.

Preparation of Calcium Nitrite

Calcium Nitrite is prepared through the reaction of Calcium Carbonate or Calcium Hydroxide with Nitrous acid or Nitric oxide. The reaction between Calcium Carbonate and Nitrous acid produces Calcium Nitrite, Carbon Dioxide, and Water.

The chemical equation for this reaction can be represented as:

CaCO3 + 2HNO2 Ca(NO2)2 + CO2 + H2O

The reaction between Calcium Hydroxide and Nitric oxide produces Calcium Nitrite, Water, and Nitrogen dioxide. The chemical equation for this reaction can be represented as:

Ca(OH)2 + 2NO Ca(NO2)2 + H2O + NO2

Calcium Nitrite can also be prepared through the reaction between Nitrogen dioxide and Calcium Hydroxide in the presence of Nitrous oxide.

The chemical equation for this reaction can be represented as:

2Ca(OH)2 + 2NO2 + N2O 2Ca(NO2)2 + 2H2O + N2

Properties and Characteristics of Calcium Nitrite

Physical Properties

Calcium Nitrite is a white or yellowish crystalline solid that is soluble in water but insoluble in most organic solvents such as ethanol and ether. It has a molecular weight of 132.087 g/mol and a density of 2.5 g/cm3.

The compound is slightly hygroscopic, meaning that it readily absorbs water molecules from its surroundings. This property gives Calcium Nitrite its characteristic blue coloration due to the formation of a hydrated compound.

Calcium Nitrite has a melting point of approximately 243C and a boiling point of 340C. The compound has a neutral pH level that ranges from 7.0 to 8.0, making it an effective buffering agent in various chemical reactions.

Chemical Properties

Calcium Nitrite is a stable and non-combustible compound that is not considered a hazardous material. The compound is an oxidizing agent, and it possesses a strong oxidizing property.

It is relatively inert but can react with various substances under specific conditions. Calcium Nitrite is known for its corrosion-inhibiting properties, making it an essential additive in the production of concrete structures.

The compound protects the reinforcement steel in concrete from corrosion, thereby preventing the degradation and weakening of the structure over time. Calcium Nitrite is also used as a curing agent in meat and fish products.

The compound prevents browning and discoloration during packaging and storage by inhibiting bacterial growth. Additionally, Calcium Nitrite is used as an intermediate in the production of nitrous gases, dyes, and pigments.

The compound acts as an oxygen scavenger in boilers, improving their performance and reducing the risk of corrosion.

Conclusion

In conclusion, Calcium Nitrite is a highly versatile compound with numerous industrial, commercial, and agricultural applications. It possesses unique properties and characteristics that make it an essential component in various products and processes.

Understanding the preparation methods, physical and chemical properties of Calcium Nitrite is crucial for individuals in various industries who require this chemical for their processes. It is their responsibility to ensure that they handle this chemical safely and appropriately to prevent harm to the environment and human health.

Atomic and Crystal Structure of Calcium Nitrite

Calcium Nitrite has an ionic compound structure with positively charged Calcium ions (Ca2+) and negatively charged Nitrite ions (NO2). The Calcium ion has a coordination number of six, meaning that it bonds to six Nitrite ions forming an octahedral geometry.

The Nitrite ion has a molecular structure with a central nitrogen atom bonded to two oxygen atoms through a double bond and a single bond. Nitrite ions bond ionically with other ions, such as Calcium ions in Calcium Nitrite, forming crystalline structures.

The crystal structure of Calcium Nitrite is monoclinic, and its unit cell consists of one Calcium ion, two Nitrite ions, and six water molecules. The Calcium ion is centrally located, and the Nitrite ions surround it in an octahedral geometry.

Water molecules fill the empty space around the Calcium ion and Nitrite ions, leading to a hydrated crystal structure.

Prominent Reactions involving Calcium Nitrite

Calcium Nitrite is known for its unique chemical reactivity, making it an important industrial chemical in various applications. Several reactions involving Calcium Nitrite are prominent, and they include the following:

1.

Conversion of Nitrite to Nitrate – Calcium Nitrite reacts with atmospheric oxygen in the presence of water, oxidizing Nitrite ions to Nitrate ions. The reaction proceeds as follows:

Ca(NO2)2 + O2 + H2O 2Ca(NO3)2

The reaction is exothermic and requires moisture, oxygen, and Calcium Nitrite to proceed.

This reaction makes Calcium Nitrite an effective oxygen scavenger, particularly in boiler water treatment applications, where it acts as a corrosion inhibitor. 2.

Reduction of Iron (II) – Calcium Nitrite can reduce Iron (II) ions to Iron (III) ions. The reaction proceeds as follows:

2FeSO4 + 3Ca(NO2)2 + 4H2O Fe2O3 + 3CaSO4 + 6HNO2

The reaction is particularly useful in water treatment applications, where Iron (II) ions are removed from wastewater streams.

3. Protection against Corrosion in Concrete – Calcium Nitrite reacts with Chlorides in concrete to form a stable and passive layer on the surface of the reinforcement steel.

The reaction proceeds as follows:

Ca(NO2)2 + 2NaCl CaCl2 + 2NaNO2

The reaction forms a protective layer on the surface of the steel, which prevents chloride and moisture penetration, thereby protecting the steel from corrosion. 4.

Conservation of Meats and Seafood – Calcium Nitrite is applied directly to the surface of meat and seafood to prevent bacterial growth, resulting in discoloration and spoilage. The reaction proceeds as follows:

2Ca(NO2)2 + 2H2O 2Ca(OH)2 + 2NO + O2

The Calcium Nitrite reacts with proteins in the meat to form a pink color, which improves the appearance, odor, and flavor of the final product.

5. Reduction of Oxides to Nitrides – Calcium Nitrite can reduce various oxides to nitrides.

The reaction proceeds as follows:

Ca(NO2)2 + SiO2 CaSiO3 + 2NO

This reaction is particularly relevant in the production of silicon nitride ceramics.

Conclusion

In summary, Calcium Nitrite’s atomic and crystal structure is an ionic compound structure, primarily composed of Calcium and Nitrite ions forming a monoclinic crystal lattice. It has several prominent reactions that make it useful in various industrial, commercial, and agricultural applications.

Understanding these reactions and their mechanisms is essential in optimizing the use of Calcium Nitrite while ensuring safety, quality, and environmental responsibility.

Uses of Calcium Nitrite

Calcium Nitrite has numerous industrial, commercial, and agricultural uses, and some of the most prominent ones include the following:

1. Corrosion Inhibitor – Calcium Nitrite is an effective corrosion inhibitor in concretes structures, preventing the corrosion of reinforcement steel.

2. Antifreeze – Calcium Nitrite is used as an antifreeze in industrial applications.

The compound has excellent properties for protecting various metals from freezing, cracking, and corrosion. 3.

Fertilizers – Calcium Nitrite is used as an essential component in several types of fertilizers. It improves soil quality and enhances the growth of plants while simultaneously reducing nitrate leaching into the groundwater.

4. Salt Corrosion – Calcium Nitrite is used to inhibit the corrosion of salt on metal surfaces, particularly in naval applications.

5. Water Treatment – Calcium Nitrite is added to the water treatment process to prevent iron corrosion and reduce the disintegration of pipe fittings caused by chlorine products.

6. Industrial applications – Calcium Nitrite is used in Industrial applications for the production of nitrous gases, dyes, pigments, pharmaceuticals, and chemical intermediates.

Safety Precautions While Handling Calcium Nitrite

Calcium Nitrite is a poisonous compound that requires appropriate handling and storage. Direct contact with the skin can cause severe burns, while inhalation of its toxic fumes can cause respiratory problems.

Therefore, safety precautions are vital when handling Calcium Nitrite. Below are some safety precautions to consider:

1.

Handling and Storage – Calcium Nitrite should be kept in its original closed container and stored in a cool, dry, and well-ventilated area. The container should be clearly labeled with the appropriate hazard warnings and instructions.

Proper personal protective equipment, such as gloves, lab coats, safety goggles, and respiratory masks, should be worn when handling this compound. 2.

Handling Procedures – Calcium Nitrite should not be ingested or inhaled, and direct skin contact should be avoided. Any spills of this compound should be cleaned up immediately using an appropriate absorbent material such as sand and vinegar.

3. Disposal – Calcium Nitrite should be disposed of in accordance with local regulations and guidelines.

Empty containers should be appropriately disposed of, and any unused or expired compound should be brought to a designated facility that can deal with its safe disposal. 4.

First Aid – In case of accidental exposure, appropriate first aid measures should be taken, and medical attention should be sought immediately. If the compound is ingested, vomiting should not be induced, nor should any liquids be administered orally.

In case of skin contact, contaminated clothing should be removed, and the affected area should be washed with plenty of water.

Conclusion

Calcium Nitrite is an essential inorganic compound that has diverse applications in several fields. Its unique properties allow it to function as an effective corrosion inhibitor, antifreeze, and water treatment agent.

Calcium Nitrite must be handled with extreme caution and proper safety precautions to prevent harm to human health and the environment. Individuals handling the compound must always wear appropriate clothing and use safety equipment to reduce potential exposure to its poisonous components.

When properly managed, Calcium Nitrite can be instrumental in various industrial, agricultural, and commercial applications.

Price of Calcium Nitrite

The cost of Calcium Nitrite can vary depending on various factors such as purity, quantity, and the supplier. It is essential to consider these factors when determining the price of Calcium Nitrite for specific applications.

Calcium Nitrite is available for purchase from chemical suppliers, both online and offline. These suppliers may offer different prices based on market conditions, competition, and their own cost structures.

It is advisable to compare prices from multiple suppliers to ensure a fair and competitive price. The cost of Calcium Nitrite is typically quoted on a per-kilogram basis or per-pound basis.

The price range can vary significantly, starting from a few dollars per kilogram or pound and going up to tens or even hundreds of dollars per kilogram or pound. Factors influencing the cost of Calcium Nitrite:

1.

Purity: The purity of Calcium Nitrite can greatly impact its price. Higher purity levels often command a higher price due to the additional processing and quality control measures required during manufacturing.

2. Quantity: The quantity required can also affect the cost of Calcium Nitrite.

Bulk purchases, such as buying in large volumes or in bulk containers, tend to be more cost-effective than purchasing small quantities. Suppliers may offer discounts for bulk orders, reducing the overall price per unit.

3. Supplier: Different suppliers may offer varying prices for Calcium Nitrite.

It is recommended to establish relationships with reputable suppliers who provide competitive pricing and reliable product quality. 4.

Market conditions: Like any other chemical compound, the market conditions can impact the price of Calcium Nitrite. Factors such as supply and demand, availability of raw materials, and global economic conditions can influence the price fluctuations.

When determining the cost of Calcium Nitrite, it is essential to consider the overall value it provides for the intended application. The cost should be balanced with factors such as its effectiveness as a corrosion inhibitor, its impact on product quality, and its compatibility with other compounds in the formulation.

It is also important to consider additional costs associated with handling and storage. Proper storage facilities, safety equipment, and personnel training should be factored into the overall cost to ensure safe and appropriate handling of Calcium Nitrite.

Before finalizing a purchase, it is recommended to request quotes from multiple suppliers, compare pricing, and evaluate other factors such as delivery terms, payment options, and customer service. This will ensure a well-informed purchasing decision that balances cost-effectiveness with quality and reliability.

In conclusion, the cost of Calcium Nitrite can vary depending on factors such as purity, quantity, supplier, and market conditions. Buyers should consider these factors and compare prices from multiple suppliers to ensure a fair and competitive price.

Additionally, the overall value and suitability of Calcium Nitrite for the intended application should be evaluated in relation to its cost. In conclusion, Calcium Nitrite is an important compound with various industrial, commercial, and agricultural uses.

Its properties make it an effective corrosion inhibitor, antifreeze, and water treatment agent. When handling Calcium Nitrite, proper safety precautions should be taken due to its toxicity.

The price of Calcium Nitrite can vary depending on factors such as purity, quantity, and the supplier. It is crucial to consider these factors and obtain quotes from reputable suppliers.

The importance of understanding the properties, uses, safety precautions, and cost of Calcium Nitrite lies in its ability to improve processes, protect structures, and enhance product quality. By ensuring proper handling, evaluating pricing options, and considering the value it brings to applications, individuals can utilize Calcium Nitrite effectively and responsibly.

FAQs:

1. Is Calcium Nitrite toxic?

Yes, Calcium Nitrite is toxic and should be handled with caution to avoid contact with skin, inhalation of its fumes, or ingestion. 2.

What are the primary uses of Calcium Nitrite? Calcium Nitrite is primarily used as a corrosion inhibitor, antifreeze, and in water treatment processes.

It is also used in fertilizers and salt corrosion prevention. 3.

How should Calcium Nitrite be stored? Calcium Nitrite should be stored in a cool, dry, and well-ventilated area in its original closed container, away from incompatible substances.

4. What factors affect the cost of Calcium Nitrite?

The cost of Calcium Nitrite is influenced by factors such as purity, quantity, supplier, and market conditions. 5.

Are there any safety precautions when handling Calcium Nitrite? Yes, safety precautions include wearing appropriate protective equipment, avoiding direct skin contact, and ensuring proper ventilation when handling Calcium Nitrite.

Final thought: Proper understanding of the uses, safety precautions, and cost of Calcium Nitrite is crucial for individuals in various industries to harness its benefits effectively while prioritizing safety and responsibility.

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