What’s the Difference between Calcium Hypochlorite and Sodium Hypochlorite?
What is Calcium Hypochlorite?
Calcium hypochlorite is a calcium-based salt that appears as light gray of white granules. This inorganic chemical is soluble in water. The inorganic compound calcium hypochlorite has the formula Ca(OCl)2. It is the major active component in commercial chlorine powder, bleaching powder, or chlorinated lime products that are used for treating water and bleaching.
What is Sodium Hypochlorite?
Sodium hypochlorite is an inorganic chemical with a sweet smell that appears as a yellow transparent substance. The solution sodium hypochlorite (NaOCl) is created by reacting chlorine with sodium hydroxide. Most chlor-alkali cells produce these two reactants as the main co-products. Sodium hypochlorite is a disinfectant and antibacterial substance with a wide range of applications. It is available in two forms; the pentahydrate form and the anhydrous form.
Differences between Calcium Hypochlorite and Sodium Hypochlorite
Calcium hypochlorite appears as a granular white substance or tablets compressed from the granular. The solution of sodium hypochlorite, on the other hand, is transparent, slightly yellowish, and has a distinct odor.
Chemical properties of Calcium Hypochlorite and Sodium Hypochlorite
Calcium hypochlorite is relatively stable compound than sodium hypochlorite. Sodium hypochlorite is a very unstable compound. Calcium hypochlorite has a melting and boiling point of 100°C and 175°C, whereas the melting and boiling points for sodium hypochlorite are 18°C and 101°C. Calcium hypochlorite has a higher amount of chlorine in its composition compared to sodium hypochlorite. Both calcium hypochlorite and sodium hypochlorite are inorganic compounds.
Calcium Hypochlorite Production
In the industrial world, calcium hypochlorite is made by processing lime with chlorine gas. The reaction can be carried out in phases to produce various compositions containing varying amounts of calcium hypochlorite, as well as unconverted lime and calcium chloride. Slaked lime that is slightly wet is used to make bleaching powder. It is made up of calcium chloride and calcium hydroxide.
Sodium Hypochlorite Production
Sodium hypochlorite is produced in two ways. The first is by dissolving salt in softened water, this results in a concentrated brine solution. When this solution is electrolyzed, sodium hypochlorite is formed in water. The explosive hydrogen gas is also produced during this process. The second process of producing sodium hypochlorite is by mixing caustic soda with chlorine gas. Sodium hypochlorite, water, and salt are generated as a result of this process.
Prices of Calcium Hypochlorite and Sodium Hypochlorite
Calcium hypochlorite costs significantly more than sodium hypochlorite. Sodium hypochlorite costs $450 per ton. Granular calcium hypochlorite from the sodium process costs $1020 per ton, granular calcium hypochlorite from the calcium process costs $1368 per ton, calcium hypochlorite tablets cost $1000 per ton, and calcium hypochlorite powder costs $1000 per ton.
Handling and Storage of Calcium Hypochlorite
Calcium hypochlorite should be stored in a cool, dark and dry place in closed, corrosion-resistant containers such as wooden, plastic, cement and ceramic containers. Make sure that all chemicals are stored in accordance with the manufacturer's local safety regulations and instructions. This is to ensure that it is safe for the operator and so that the chemical does not deteriorate.
Handling and Storage of Sodium Hypochlorite
Sodium hypochlorite is a highly unstable chemical and is therefore sold in a less dangerous pentahydrate form. The chemical reacts with carbon dioxide to form Sodium carbonate. It also reacts with metals like zinc to form a hydroxide. Properly store sodium hypochlorite and keep it away from incompatible items. Avoid keeping bleach with substances such as reducing agents, organic compounds, and acids. Sodium hypochlorite must be stored in airtight bottles at temperatures below 68 degrees Fahrenheit (20 degrees Celsius).
Functionality & Uses
Uses of Calcium Hypochlorite
- Calcium hypochlorite is mainly used to disinfect water. This is primarily done for drinking water and for water in swimming pools.
- This chemical is highly soluble in water and for swimming pool water, it is mixed with other low chlorine content chemicals to prevent a reaction.
- Calcium hypochlorite is also used to disinfect livestock pens, especially after a viral disease had caused the death of an animal.
- In dairies, wineries, breweries, canneries, food processing facilities, and beverage bottling factories, it's utilized for bacterial control, odor management, and general cleanliness. It's used in and around the house, boats, campers, and trailers to get rid of mildew.
- Farmers use calcium hypochlorite to disinfect aquariums in cases where dirty water found its way into the aquarium.
- It can also be used as a neutralizer when a highly poisonous chemical leaks. This makes it safe for both humans and animals within the area.
- Calcium hypochlorite can also be used as a cleaning agent where it is mixed with water to form bleaching material.
- Because calcium hypochlorite is a universal oxidizing agent, its applications are widely known in organic chemistry.
- Chloroform may also be made using calcium hypochlorite in the haloform process.
- In organic synthesis, calcium hypochlorite can be used to oxidize thiol and sulfide byproducts, reducing their odor and making them safe to dispose of.
Uses of Sodium Hypochlorite
- Sodium hypochlorite is mainly used as a household bleach. The bleaching solutions have a mixture of Sodium hypochlorite and Sodium hydroxide. The bleaches can be used to remove stains and also act as effective household cleaner to remove stairs in crockery.
- Sodium hypochlorite is used in hospitals and public health facilities as a disinfectant. It is also used as a neutralizer for infectious body fluids. Hypochlorite is widely used in houses to purify and disinfect the environment.
- Sodium hypochlorite can be effectively used for water purification. It is used on a large scale for surface purification, bleaching, odor removal and water disinfection.
- Sodium hypochlorite is utilized on a large scale in the agricultural industry, chemical industry, paint-and-lime industry, food industry, glass industry, paper industry, pharmaceutical industry, synthetics industry, and waste disposal sector.
- Fabric in the textile industry is bleached using sodium hypochlorite.
- It's occasionally used in the treatment of industrial waste water.
- Sulphur hydrogen gas and ammonia are neutralized by hypochlorite. It's also used in the metal industry to detoxify cyanide baths.
- In cooling towers, hypochlorite can be used to inhibit algae and shellfish development. Hypochlorite is a disinfectant used in water treatment.
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