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Calcium Hypochlorite
- Origin
- : China
- CAS Number
- : 7778-54-3
- HS Code
- : 2828.10.00
Basic Info
- IUPAC Name
- : calcium bis(hypochlorite)
- Molecular Formula
- : Ca(OCl)2
- Molecular Weight (g/mol)
- : 142.9800
- Synonyms & Trade Names
- : Calcium hypochlorite; HTH; Bleaching powder; Chlorinated lime
- Purity / Assay (%)
- : 65-70% active Cl
- Grade / Quality Level
- : Industrial Grade
- Physical Form
- : Solid
- Concentration
- : Pure substance
- Appearance / Color
- : White to off-white solid
- Odor
- : Chlorine-like
- Density (g/cm³)
- : 2.3500
- Solubility in Water
- : Freely soluble (18g/100mL)
- Signal Word
- : Danger
- UN Number
- : 2208
- GHS Hazard Class
- : Oxidizer; Acute toxic; Skin corrosive; Aquatic hazard
- H-Statements
- : H271|H290|H302|H312|H314|H400|H410
- P-Statements
- : P210|P220|P221|P234|P260|P264|P273|P280|P301+P330+P331
- REACH Status
- : Registered
- Drug Precursor Status
- : Non-precursor
- Storage Class (GHS)
- : 5.1
- Storage Conditions
- : Cool, dry; strong oxidizer; away from combustibles
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About Calcium Hypochlorite Ca(OCl)2
Calcium hypochlorite exists as a white granular powder and has the formula of Ca(OCl)2. It has a strong scent of chlorine but is more stable than chlorine. It exists as both anhydrous and hydrated forms, giving a basic aqueous solution.
The basicity of the solution arises from the hydrolysis reaction, where calcium hypochlorite is broken down into hypochlorous acid and calcium hydroxide. The basicity outweighs the acidity property since calcium hydroxide is a strong base and hypochlorous acid is a weak acid.
Calcium hypochlorite is a good chlorine derivative and can release chlorine upon reactions. Calcium hypochlorite can react with carbon dioxide to form calcium carbonate, releasing dichloride monoxide. Similarly, calcium hypochlorite can also react with hydrochloric acid to form calcium chloride, water and gaseous chlorine.
It is a solid substitute for liquid sodium hypochlorite for water treatment and bleaching. As a key product, calcium hypochlorite is distributed and supplied by various calcium hypochlorite suppliers and calcium hypochlorite distributors to meet industrial needs.
Manufacturing Process
Calcium Process
Calcium hypochlorite is manufactured using the calcium process, where chlorine is added to calcium hydroxide, yielding calcium hypochlorite, calcium chloride and water. However, this method was not very effective and became obsolete. It was replaced by the sodium process, which accounts for 70% of the total production of calcium hypochlorite.
Sodium Process
Calcium hypochlorite can also be manufactured using sodium process by chlorination of a slurry of lime and caustic soda and then dried under vacuum
2 NaOH + Ca(OH)2 + 2 Cl2 → Ca(OCl)2 + 2 NaCl + 2 H2O
Chlorination
Calcium hypochlorite can be manufactured by chlorination of hydrated lime.
2 Ca(OH)2 + 2 Cl2 → Ca(OCl)2 + CaCl2 + 2 H2O
Drying
Calcium hypochlorite may be achieved by drying a filter cake of neutral calcium hypochlorite dihydrate containing 30-50% water.
Calcium Hypochlorite Supplier and Distributor
As a calcium hypochlorite supplier and distributor, it is essential to provide high-quality products and reliable service to meet the needs of various applications, including water treatment and bleaching.