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Ferric Chloride play different roles in water treatment

Iron(III) chloride - Physico-chemical Properties
Molecular Formula:Fecl3
Molar Mass:162.2
Density:2,804 g/cm3
Melting Point:304°C(lit.)
Boling Point:316 °C
Flash Point:316°C
Water Solubility:920 g/L (20 ºC)
Solubility:H2O: soluble
Vapor Presure:1 mm Hg ( 194 °C)
Vapor Density:5.61 (vs air)


Iron(III) chloride - Names and Identifiers

Name:Ferric chloride




Iron(III) chloride

Flores martis
Ferric chloride
iron trichloride
Ferric trichloriIron(III) chloride
Iron chloride (FeCl3)
Iron chloride (Fe2Cl3)
ferric chloride anhydrous
Ferric chloride, anhydrous
Iron (III) chloride anhydrous
Ferric Chloride Manufacturer
Ferric chloride test solution(ChP)


Ferric chloride is a compound that will undergo hydrolysis after being dissolved in water. The iron ions in ferric chloride will combine with hydroxide ions in water to form ferric hydroxide colloids that are slightly soluble in water, and ferric hydroxide The colloid has a good flocculation effect, and the water purification principle of ferric chloride is also realized through these.

Ferric chloride can be used as flocculant or coagulant in water treatment, no matter which function has a very good effect. Ferric chloride is very soluble in water, so the hydrolysis speed is fast, and the formed ferric hydroxide can adsorb the suspended solid particles in the sewage to achieve the effect of water purification. Because ferric chloride contains a large amount of iron ions, it can react with the polarity of various sulfides contained in sewage to produce water-insoluble precipitates, so as to achieve the effect of removing sulfides.

Ferric chloride in ferric chloride has strong oxidizing properties, so ferric chloride can achieve other functions through oxidation in sewage treatment, such as decolorization, deodorization, oil removal, Phosphorus removal, COD removal and other functions all utilize the hydroxide property of ferric chloride.

Ferric chloride can replace many other water purification agents in the sewage treatment industry, and has excellent flocculation effect. At the same time, the alum flowers formed are dense and the precipitation speed is fast. The amount of sewage sludge treated by ferric chloride Small, can greatly save sludge treatment costs, etc.

Ferric chloride is commonly used in water treatment due to its various roles and functions. Some of the different roles it plays in water treatment include:

  1. Coagulation and Flocculation: Ferric chloride is a commonly used coagulant in water treatment. It helps in destabilizing suspended particles and colloids in water, allowing them to come together and form larger flocs. These flocs can then be easily removed during the sedimentation or filtration process.

  2. pH Adjustment: Ferric chloride can be used to adjust the pH of water. It is often added to raise the pH level in acidic water, helping to neutralize the acidity and bring it to a more acceptable range.

  3. Disinfection: Ferric chloride has disinfectant properties and can help in killing or inhibiting the growth of bacteria, viruses, and other microorganisms in water. It is particularly effective against certain types of bacteria, such as E. coli.

  4. Phosphorus Removal: Ferric chloride is used for phosphorus removal in water treatment. It reacts with phosphorus compounds present in water, forming insoluble precipitates that can be easily removed during the treatment process. This is important as excessive phosphorus in water bodies can lead to eutrophication and harmful algal blooms.

  5. Odor and Color Removal: Ferric chloride can help in removing unpleasant odors and colors from water. It reacts with organic compounds responsible for these characteristics, forming insoluble precipitates that can be removed during treatment.

  6. Sludge Conditioning: Ferric chloride is used as a sludge conditioner in water treatment plants. It helps in improving the dewatering characteristics of sludge, making it easier to handle and dispose of.

Overall, ferric chloride plays a crucial role in water treatment by aiding in coagulation, pH adjustment, disinfection, phosphorus removal, odor and color removal, and sludge conditioning.



Ferric Chloride 99% MIN
FeCl3 96 MIN 99.40% GB/T 1621-2008
FeCl2 2% MAX 0.20% GB/T 1621-2008
INSOLUBLE 1.5% MAX 0.25% GB/T 1621-2008

Ferric Chloride 99% MIN
FeCl396 MIN99.40%GB/T 1621-2008
FeCl22% MAX0.20%GB/T 1621-2008
INSOLUBLE1.5% MAX0.25%GB/T 1621-2008

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