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Calcium Hypochlorite Sodium Process

Posted at: Offers to Sell and Export | Posted on: Tue 11 May, 2010 6:15 am |
calcium hypochlorite sodium
Products Photos CatalogCalcium Hypochlorite Photos Catalog

Calcium Hypochlorite (Sodium Process): Calcium Hypochlorite (Sodium Process)

Formula: Ca(clo)2


white or slight gray granular, powder, tablet


For bleaching purpose of wood pulp, silk, cloth and fibre.

Disinfection and water-treatment.

Disinfectant for chemical poisonous and radioactive substance.


Plastic bag lined II type plastic drum, net wt 25kg/40kg/50kg; or in small package, net wt 1kg/2kg/4kg/10kg. There are sign of "oxidant" on the drum

Quality Standard:

Quality standard ItemTablet

Top-grade First grade Qualified product

Available Chlorine % 70.0 67.0 65.0

Granularity (14-50mesh) % 90 87 87

Moisture % 5.5 10

More information for calcium hypochlorite as the following:

Calcium hypochlorite

Calcium hypochlorite


CAS number



Molecular formula

Ca(ClO) 2

Molar mass

142.98 g/mol

Melting point

Decomposes at 100°C

Solubility in other solvents

21 g/100 ml (25°C)

Calcium hypochlorite is a chemical compound with formula Ca ( Cl O ) 2 . It is widely used for water treatment and as a bleaching agent (bleaching powder). This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach).


It is manufactured using the calcium process or the sodium process.

Calcium Process

2 Ca(OH) 2 + 2 Cl 2 → Ca(ClO) 2 + CaCl 2 + 2 H 2 O

Sodium Process

2 Ca(OH) 2 + 3 Cl 2 + 2 NaOH → Ca(ClO) 2 + CaCl 2 + 2 H 2 O + 2 NaCl

Bleaching powder is actually a mixture of calcium hypochlorite Ca(ClO) 2 and the basic chloride CaCl 2, Ca(OH) 2, H 2 O with some slaked lime, Ca(OH) 2 .


It is a yellow white solid which has a strong smell of chlorine . Calcium hypochlorite is not highly soluble in water. For that reason it should preferably be used in soft to middle hard water. There are two types of calcium hypochlorite - a dry form and a hydrated form. The hydrated form is safer to handle.

Calcium hypochlorite reacts with carbon dioxide to form calcium carbonate and release chlorine :

2Ca(ClO) 2 + 2CO 2 → 2CaCO 3 + 2Cl 2 + O 2

Calcium hypochlorite reacts with hydrochloric acid to form calcium chloride :

Ca(ClO) 2 + 4 HCl → CaCl 2 + 2 H 2 O + 2 Cl 2

Extreme care should be used in handling this product. Always keep in a cool dry place away from any organic material. When mixing it with water, it is safest to add the calcium hypochlorite to water. This material has been known to undergo self heating and rapid decomposition accompanied by the release of toxic chlorine gas.


Calcium hypochlorite is used for the disinfection of drinking water or swimming pool water. For use in outdoor swimming pools, calcium hypochlorite can be used as a sanitizer in combination with a cyanuric acid stabilizer. The stabilizer will reduce the loss of chlorine because of UV radiation. Calcium does make the water 'hard' and tends to clog up some filters. However, some types of calcium hypochlorite do contain anti-scaling agents in order to prevent clogging up of pipes/filters. This grade of calcium hypochlorite can also be used in hard waters. The main advantage of calcium hypochlorite is that it is unstabilised unlike chlorinated isocyanurates such as sodium dichloroisocyanurate or trichloroisocyanuric acid. Latter products do contain cyanuric acid. If the level of cyanuric acid becomes too high, it will influence the performance of the chlorine. Pools running on chlorinated isocyanurates should maintain a free chlorine level between 2 and 5 ppm (mg/L), whereas pools running on calcium hypochlorite should have a chlorine level of 1-2 ppm (mg/L).

Calcium hypochlorite (known as 'bleaching powder') is also used for bleaching cotton and linen and is used in the manufacture of chloroform .

Chlorine bombs

Calcium hypochlorite, which is easily obtainable in the form of pool chlorinating agents, has been used to make 'recreational' bombs. (sometimes referred to as chlorine bombs ) Due to its oxidising property, calcium hypochlorite can be mixed with readily oxidised substances (eg. glycerine, or glycols from brake fluid ) to make a weak explosive . An alternative is to mix calcium hypochlorite with weak household acids ( cola, vinegar ), a mixture which will not explode but create a large amount of gas, predominantly chlorine . Both variants are prepared by placing an amount of calcium hypochlorite-containing pool chlorinator into a bottle made preferably from plastic, then adding either an easily oxidised or acidic substance, putting the lid on the bottle, shaking it and throwing it away. The amount of gas produced by the chemical reaction of the two substances will eventually (usually after a few seconds) cause the bottle to rupture explosively. When mixed with flammable substances, flames may be produced as well. While experimenting with 'household' explosive mixtures is obviously a high-risk activity, there are additional dangers. Not only is there a real possibility of the bomb 'going off' earlier than expected and causing serious injury, but the substances involved in the preparation, as well as the products of the chemical reaction, are harmful (calcium hypochlorite being corrosive, an irritant and strong oxidiser; chlorine gas being highly toxic). Plastic bottles will usually just rupture and not produce shrapnel. Glass bottles, however, will explode into sharp fragments which can seriously injure persons standing nearby.

Company Contact:

No member photo
Contact Name: Candy Zhang
Company Name: Holide Chemical Co., Ltd
Email: Email
Tel: 0086-13831880321 or 0086-318-8955008
Fax: 0086-318-2203888
Street Address: 276 Zhonghua Street,
Hengshui City, Hebei, China 053000
Website: http://www.holidechem.com
Member name: holidechem
Country: China-CN China
Member Since: 10 May 2010
Total Leads: 5 holidechem Import Export Business Leads
Business focus: Water Treatment Chemicals, Swimming Pool Chemicals, Trichloroisocyanuric Acid (tcca), Cyanuric Acid (ca)
Verify: Safe Import Export Tips

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