What's Calcium Chloride, and Should You Use It for Dust Control?

18 Aug.,2025

 

What's Calcium Chloride, and Should You Use It for Dust Control?

Dust plagues unpaved roads, reducing visibility, safety, and air quality. It can even kill plants and scratch cars and buildings. It’s not good for the road, either. The more dust cars kick up, the more the road degenerates. That leaves counties and companies paying extra maintenance costs to repair them and to try to control dust. 

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Many counties and companies turn to calcium chloride, a salt compound that's popular for dust control. We’ll explore what calcium chloride is, how people use it to control dust, and its pros and cons. Let’s begin!

What Is Calcium Chloride? 

Simply put, calcium chloride is a type of salt made of one part calcium and two parts chloride. Its molecular formula is CaCl2, but people may also call it calcium dichloride since it contains two chloride ions.

Calcium chloride is hygroscopic, which means it can absorb moisture from its surroundings. (We’ll talk more about how that helps it suppress dust in a minute.) 

It’s been a common dust control product for decades. You can obtain solid calcium chloride flakes, pellets, or powders. These are often anhydrous, meaning they don't contain any water. You can also buy pre-mixed, liquid calcium chloride brines.

Calcium Chloride Uses in Industry

Governments and heavy industries use calcium chloride to control dust on unpaved public and commercial access roads. And with its soil stabilization properties, it helps protect roads from erosion, too.

But you might be surprised to learn about some of calcium chloride’s uses in other industries. Take a look: 

  • Medicine: Doctors prescribe calcium chloride injections to treat patients with low calcium, high potassium, or magnesium toxicity. 
  • Recreation: Adding calcium chloride to swimming pools helps balance the water’s pH, kills bacteria and viruses, and keeps soft water from damaging the concrete. 
  • Food: Food manufacturers use calcium chloride to package and preserve items, as well as to make tofu, ice cream, cheese, and dozens of other foods.
  • Agriculture: Calcium chloride prevents dairy cows from getting a calcium deficiency called milk fever.
  • Ice Melt: Governments, businesses, and homeowners all use calcium chloride to melt ice on roads, parking lots, and sidewalks.

That’s all pretty impressive. But now, back to dust control! 

How Calcium Chloride Works to Control Dust

Calcium chloride is a desiccant, which is just a fancy name for a drying agent. It works by absorbing moisture from its environment—whether that’s the air, a liquid spill, or another substance you mix it with. 

So, let’s say you apply calcium chloride to a road. It will draw moisture from the air onto the road, dampening the soil particles, and the moisture will weigh the soil down so it’s less likely to fly into the atmosphere as dust. As a bonus, the calcium chloride will also form a crust over the road’s surface that stabilizes the soil and helps keep it from eroding.

How to Apply Calcium Chloride

It’s ideal to apply calcium chloride when humidity is high, so there’s more moisture in the air for it to work with you. But before you begin the application, it’s important to water the road first. Wetting the road helps the calcium chloride go deeper into the soil so that it will work better.

Once the road reaches its optimum moisture content, go over it with a motor grader to remove washboarding, potholes, and other damage. Then, shape the road so it will have good drainage by including ditches, shoulders, and a crown in the middle. Be sure to build turns up on the outside, too.

After you shape the road, mix calcium chloride and water into a liquid solution, then apply it with a water truck. 

Is Calcium Chloride Safe? 

The short answer is, it depends. As you saw earlier, calcium chloride has some uses that help people stay safe, get healthy, and have fun. But too much calcium chloride can be dangerous.

Pros of Calcium Chloride

When it comes to dust control, calcium chloride has several benefits:

  • It works well in humid, moist climates.
  • The upfront application costs are lower than some other soil stabilizers, like polymers.
  • It occurs naturally—no harmful synthetic chemicals here!
  • The more times you apply chlorides, the more stable your roads will be.
  • It works at temperatures over 71°F and humidities below 31%, which magnesium chloride—another popular road salt—doesn’t do.

Cons of Calcium Chloride

Just like too much rain, too much alcohol, or too much anything, there comes a tipping point where calcium chloride does more harm than good. Some cons of calcium chloride are: 

  • It only lasts around three to 12 months, so you’ll need to reapply it often. 
  • The costs of those constant reapplications and grading add up over time—so calcium chloride isn’t as cheap as it first appears.
  • Reapplications are time-consuming and labor-intensive. 
  • It doesn’t work well in hot, dry places, since there’s little moisture in the air or ground for it to absorb.
  • Calcium chloride corrodes metal and wiring in cars, as well as concrete bridges. 
  • Like any salt compound, it can build up in soil and water, making them both unusable. (That’s why ancient civilizations threw salt in their enemies’ fields—to starve them by killing their crops!)
  • Calcium chloride is not safe for the crews who handle it; it can cause severe eye, skin, and lung irritation.

An Alternative to Calcium Chloride

While calcium chloride can control dust, the negatives outweigh the positives. So, if you’re looking for a dust control solution, it’s time to consider alternatives to chlorides that are safer for your crews, your community, and the environment. We recommend Perma-Zyme. 

Perma-Zyme’s unique enzyme formula is 100% natural, non-toxic, and non-hazardous. It works in all climates. One application stabilizes soil for five-plus years in industrial settings and 10+ years on unpaved public roads, all with minimal maintenance. That’ll add up to huge cost savings over time! 

Understanding Calcium Chloride: Uses, Benefits, and More

Welcome to our comprehensive guide on calcium chloride! This amazing compound has a wide range of applications and benefits in various industries. In this article, we will explore what calcium chloride is, its uses, benefits, and potential environmental impact. We will also compare calcium chloride vs calcium gluconate and explain why calcium chloride is used in water treatment. Additionally, we will discuss calcium chloride's role in agriculture and construction, and the necessary safety precautions for handling it.

Create an image depicting the integration of calcium chloride in food preparation. Show how calcium chloride can be used to enhance texture and extend shelf life. Highlight the versatility of calcium chloride in different types of food, such as fruits, vegetables, and dairy products. Use contrasting colors to emphasize the impact of calcium chloride on the food's appearance and appeal. The image should convey the message that calcium chloride is a reliable and effective ingredient in modern food processing and preservation.

Key Takeaways:

  • Calcium chloride is a chemical compound made up ofcalcium and chlorine atoms
  • It has a wide range of uses, including food preservation, water treatment, and concrete acceleration
  • Calcium chloride is generally safe when used appropriately, but it can cause skin and eye irritation
  • It is not the same as table salt, although it has a salty taste
  • Calcium chloride is environmentally friendly when used responsibly

What is Calcium Chloride?

Calcium chloride is a chemical compound composed of calcium and chlorine atoms. This natural mineral is found in abundance in the Earth's crust and seawater. Calcium chloride is also produced as a byproduct of the Solvay process, a chemical industrial process.

Calcium chloride is a white crystalline solid that is highly soluble in water. It has a salty taste and is hygroscopic, meaning it attracts and retains moisture from the air. Calcium chloride is often used as a drying agent to remove water from gases and liquids.

Calcium chloride is a versatile compound with a wide range of applications in various industries.

Calcium chloride is often used in the creation of faux caviar-like textures in modern gastronomy techniques. It is also used in the food industry as a food additive to preserve and stabilize food products. Calcium chloride is generally recognized as safe (GRAS) by the US Food and Drug Administration (FDA) when used in appropriate amounts.

In water treatment processes, calcium chloride is used to adjust water hardness and maintain proper chemical balance. It is also used to prevent the formation of ice in water storage tanks and pipes during cold weather.

Calcium chloride is widely utilized as a de-icing agent in winter maintenance due to its ability to lower the freezing point of water. It is also employed in the pharmaceutical industry and medical treatments. It is important to note that calcium chloride is not the same as table salt, even though it has a salty taste.

The Uses of Calcium Chloride

Calcium chloride is a versatile compound used in various industries due to its unique properties. One of its most common applications is as a food additive for food preservation and stabilization. It is also used in food preparation, especially in modern gastronomy techniques such as spherification.

In spherification, calcium chloride is used to create faux caviar-like textures. It works by reacting with sodium alginate, resulting in the formation of a thin outer layer and a liquid interior. This technique has opened up new possibilities for chefs to create innovative dishes.

Industry Application Food industry Food preservation and stabilization Modern Gastronomy Spherification technique

Aside from the food industry, calcium chloride is also used in the pharmaceutical and medical fields. It is used as a source of supplemental calcium, especially in emergency situations. Calcium chloride is also employed in the treatment of hypocalcemia, a condition where there is an abnormally low level of calcium in the blood.

Calcium chloride is also used in water treatment processes. It is effective in adjusting water hardness and maintaining proper chemical balance. Liquid calcium chloride is often used to prevent the formation of ice in water storage tanks and pipes during cold weather.

In agriculture, calcium chloride is utilized to improve soil fertility and promote plant growth. It helps address nutrient deficiencies and enhances the absorption of other essential minerals by plants. Calcium chloride can also aid in the prevention of blossom end rot in certain crops.

When handling calcium chloride, it is important to use proper safety precautions. It can be irritating to the skin and eyes, so it is essential to use protective equipment. Calcium chloride is not the same as table salt, even though it has a salty taste.

In conclusion, calcium chloride has various uses in different industries. From food preservation and stabilization to water treatment and agriculture, this compound plays a vital role in modern society. Understanding its properties and applications is crucial in maximizing its benefits while minimizing its potential drawbacks.

The Benefits of Calcium Chloride

Calcium chloride offers several benefits in different fields. It is widely used as a de-icing agent in winter maintenance due to its ability to lower the freezing point of water. A solution with just 32% calcium chloride can freeze at -50°F, compared to water, which freezes at 32°F. The compound is also employed in the pharmaceutical industry and medical treatments. It is used to treat conditions such as hypocalcemia, and can also be added to intravenous fluids to enhance the delivery of calcium ions. Calcium chloride is generally considered safe when used in appropriate amounts.

Some studies have indicated that consuming too much calcium chloride as a food additive may cause health problems such as gastrointestinal irritation. However, the amounts of calcium chloride used in food preservation are considered safe by governmental health agencies.

The benefits of calcium chloride extend beyond specific industries. It is a rich source of calcium ions, which are essential for many physiological functions, including nerve signaling, muscle contraction and blood clotting. Moreover, calcium chloride is cheap and easy to produce, making it a cost-effective solution to various industrial and agricultural problems.

"Calcium chloride is an excellent de-icing material. It performs better than sodium chloride at colder temperatures because it can continue to melt ice and snow as temperatures drop." - David Powers, professor of chemical engineering at the University of Texas at Austin

Types of Calcium Chloride Supplements

There are several types of calcium chloride supplements available on the market, including tablets, capsules, and solutions for injection. These supplements are used to treat calcium deficiencies and are commonly prescribed by doctors. Calcium chloride supplements should only be taken under the guidance of a medical professional to prevent overconsumption, which can lead to health problems.

Calcium Chloride in Water Treatment

Calcium chloride plays a vital role in water treatment processes, particularly in adjusting water hardness and maintaining proper chemical balance. The compound is highly soluble in water, making it easy to dissolve and distribute.

So, why is calcium chloride in water? Calcium chloride is used to remove impurities from water, such as excess metal ions, that can cause hardness and affect its quality. The addition of calcium chloride can regulate the pH levels of water, making it less corrosive and reducing the risk of damage to pipes and equipment.

Liquid calcium chloride, in particular, is widely utilized in the treatment of water storage tanks and pipes during cold weather. It prevents the formation of ice, ensuring that water flows continuously and reducing the risk of damage to water systems.

The Science Behind Calcium Chloride in Water Treatment

Calcium chloride is used in water treatment to help reduce alkalinity, or the amount of acid needed to neutralize a base. It reacts with carbonate and bicarbonate ions in water to form calcium carbonate, which is then removed as a solid precipitate. This process helps reduce the overall hardness of the water and improves its quality.

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The use of calcium chloride in water treatment is regulated by government agencies to ensure safe and effective treatment. Proper handling and dosing are essential to prevent over-treatment or contamination.

Comparing Calcium Chloride to Other Water Treatment Chemicals

Calcium chloride is just one of many chemicals used in water treatment. Other common chemicals include sodium hypochlorite, hydrogen peroxide, and potassium permanganate.

Compared to these chemicals, calcium chloride is preferred for its ability to adjust water hardness and maintain chemical balance. It is also less volatile and poses less of a risk to human health and the environment.

Calcium Chloride vs Calcium Gluconate

Calcium chloride and calcium gluconate are two different compounds that serve as sources of supplemental calcium. While both can be used to treat conditions caused by calcium deficiencies, it is important to understand their differences to determine which one is appropriate for a specific situation.

Calcium chloride is a salt compound made up of calcium and chloride ions. It is highly soluble in water and readily dissolves into ions when mixed with water. Calcium chloride is often used for instant calcium supplementation in emergencies due to its fast absorption rate in the body. However, it is not recommended for long-term use as it can cause tissue damage and is irritating to the veins.

Calcium gluconate, on the other hand, is a calcium salt of gluconic acid. It is less soluble in water compared to calcium chloride, but it has a milder taste and is less irritating to the veins. Calcium gluconate is often used for daily maintenance to prevent calcium deficiencies in the body.

Table:

Calcium Chloride Calcium Gluconate Faster absorption rate Slower absorption rate Highly soluble in water Less soluble in water Not recommended for long-term use Safe for long-term use Irritating to the veins Less irritating to the veins

It is important to consult with a healthcare professional before taking any calcium supplements. They can provide guidance on which calcium compound is appropriate for a specific condition and dosage.

Industrial Applications of Calcium Chloride

Calcium chloride has a wide range of industrial applications due to its unique properties. The compound is utilized in the manufacturing of plastics, dyes, and textiles. It is also used in the oil and gas industries to make drilling fluids and as a desiccant for moisture removal in storage areas.

Comparison between Calcium Chloride and Other Industrial Compounds

Compound Uses Calcium Chloride Manufacturing of plastics, dyes, and textiles; oil and gas industries for drilling fluids; desiccant for moisture removal in storage areas. Sodium Chloride Production of chlorine and sodium hydroxide; food preservation and flavoring. Potassium Chloride Fertilizers; salt substitutes; food processing.

Calcium chloride's unique properties make it a valuable compound in various industrial applications. Its ability to attract and retain moisture, adjust water hardness, and lower the freezing point of water makes it a versatile and useful chemical.

"Calcium chloride is an essential ingredient in many of our products. Its hygroscopic nature makes it a valuable component for moisture-sensitive products."

With its extensive range of applications, calcium chloride plays a crucial role in industrial manufacturing and development. Its contributions in various industries enhance the efficiency and productivity of operations and pave the way for innovative solutions to modern-day challenges.

Safety Precautions and Handling of Calcium Chloride

While calcium chloride is generally safe when handled properly, it is important to take precautions when using it. The compound can be irritating to the skin and eyes, so it is essential to wear appropriate protective equipment.

It is crucial to note that calcium chloride is not the same as table salt, even though it has a salty taste. While table salt is sodium chloride, calcium chloride is a different compound.

It is also important to store calcium chloride properly to avoid any potential hazards. The compound should be kept in a cool, dry place, away from sources of ignition and incompatible materials.

First Aid Measures

If you come into contact with calcium chloride, it is essential to follow proper first aid measures.

If the compound gets on your skin, remove any contaminated clothing and wash the affected area with soap and water. If the irritation persists, seek medical attention.

If calcium chloride comes into contact with your eyes, flush them with plenty of water for at least 15 minutes. Seek medical attention immediately.

Disposal

Calcium chloride is a biodegradable compound and breaks down into harmless components. However, it should be disposed of properly to avoid any environmental damage.

If you have small quantities of calcium chloride, it can be safely disposed of in the trash. For larger quantities, it is best to consult with your local waste management facility to determine the appropriate disposal method.

"Using calcium chloride safely and responsibly is crucial to ensure its benefits while minimizing any risks and environmental impact."

Environmental Impact of Calcium Chloride

Calcium chloride is a compound that is generally considered environmentally friendly when handled properly. The chemical is biodegradable and breaks down into harmless components. However, excessive use can lead to soil salinity and damage to vegetation.

When calcium chloride is used in proper amounts, it can help improve soil fertility and promote plant growth in agriculture. It aids in addressing nutrient deficiencies and enhances the absorption of other essential minerals by plants. Additionally, calcium chloride can prevent blossom end rot in certain crops.

In the construction industry, calcium chloride is used as a concrete accelerator and to control dust on construction sites and roads. It speeds up the curing process and increases the strength of concrete.

"Calcium chloride is a versatile compound that plays a crucial role in various industries. Understanding the properties and proper handling of calcium chloride is essential to harness its full potential while ensuring safety and minimizing environmental impact."

It is important to handle calcium chloride with caution and use protective equipment when necessary, as it can be irritating to the skin and eyes. Calcium chloride is not the same as table salt, even though it has a salty taste.

Calcium Chloride in Agriculture

Calcium chloride is a valuable compound in the agricultural industry, known for its ability to enhance soil fertility and improve plant growth. Its use has proven to be beneficial in addressing nutrient deficiencies and promoting the absorption of other essential minerals such as potassium and phosphorus.

The compound is particularly useful in improving the yield and quality of crops, making it highly sought after by farmers and agriculturalists. A deficiency in calcium can cause problems ranging from stunted growth, poor root development, and poor fruit development.

Benefits of calcium chloride in agriculture

Calcium chloride offers a range of benefits when used in agriculture:

  • Fights crop diseases: Calcium chloride has antimicrobial properties that make it an effective tool for fighting crop diseases such as blossom end rot in tomatoes and peppers.
  • Improves soil structure: The hygroscopic nature of calcium chloride helps improve soil structure by increasing soil porosity, allowing for better water and nutrient retention.
  • Stimulates plant growth: Calcium chloride promotes root growth, increases crop yield, and enhances the absorption of other essential nutrients.
  • Reduces plant stress: Calcium chloride helps plants cope with environmental stress, such as drought and heat, by improving their ability to absorb nutrients and water.

Application of calcium chloride in agriculture

Calcium chloride is commonly applied in agriculture in different ways, including:

  1. As a foliar spray: Calcium chloride can be applied to the foliage of crops, allowing for fast absorption of calcium.
  2. As a soil drench: Calcium chloride can be applied to the soil to improve soil structure and promote root development.
  3. As a fertilizer: Calcium chloride can be used as a fertilizer to provide calcium and chloride ions to the plant.

When using calcium chloride in agriculture, it is essential to use it in the appropriate amounts and following the instructions carefully. Overuse can lead to increased soil salinity and damage to plant roots.

Overall, calcium chloride is a valuable tool in promoting plant growth and enhancing crop yield, making it an essential compound in the agricultural industry.

Calcium Chloride in Construction

Calcium chloride finds numerous applications in the construction industry.

One of the main uses of calcium chloride is as a concrete accelerator. It speeds up the curing process, reducing the time it takes for concrete to reach its full strength and increasing the durability of concrete structures.

In addition to its role as a concrete accelerator, calcium chloride helps control dust on construction sites and roads. It is an effective dust suppressant and can reduce the amount of dust generated during construction activities, improving air quality and reducing health risks for workers and nearby residents.

When used responsibly, calcium chloride can also have a positive environmental impact in construction. It can aid in reducing the amount of water used in concrete mixes, leading to significant water savings in the long run.

To better understand the benefits of using calcium chloride in construction, let's take a look at this table:

Benefit Explanation Concrete acceleration Calcium chloride speeds up the curing process of concrete, reducing time and increasing durability. Dust control Calcium chloride helps suppress dust on construction sites and roads, improving air quality. Water savings Calcium chloride can reduce the amount of water used in concrete mixes, leading to significant water savings.

As with any industrial chemical, it is important to handle calcium chloride with care and take proper safety precautions to minimize risk. Keep in mind that calcium chloride is not the same as table salt and can be irritating to the skin and eyes.

In conclusion, calcium chloride is an essential chemical in the construction industry, playing a vital role in concrete acceleration, dust control, and water savings. When used responsibly and handled properly, calcium chloride can have both practical and environmental benefits in construction.

Conclusion

Calcium chloride is an important chemical compound with a broad range of applications across various industries. From serving as a de-icing agent in winter maintenance to aiding in the prevention of blossom end rot in crops, calcium chloride has proven to be a versatile compound.

Moreover, we have seen that calcium chloride is generally safe when handled properly, and its environmental impact can be minimized by responsible use. It is important to note that calcium chloride is not the same as table salt and has its own unique characteristics and uses.