10028-22-5
ferric sulfate
CAS: 10028-22-5
Molecular Formula: Fe2O12S3
10028-22-5 - Names and Identifiers
10028-22-5 - Physico-chemical Properties
| Molecular Formula | Fe2O12S3 |
| Molar Mass | 399.88 |
| Density | 3.097 |
| Melting Point | 480°C |
| Boling Point | 101-118 °C |
| Water Solubility | Soluble in water. Sparingly soluble in alcohol. Almost insoluble in acetone and ethyl acetate. Insoluble in sulfuric acid and ammonia. |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | Powder |
| Color | Yellow-gray |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: TWA 1 mg/m3 |
| Merck | 14,4032 |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | Appearance polyferric sulfate red-brown viscous liquid other Polynuclear Complex Ions can provide a large amount of Fe(H20)63 ,Fe2(OH)42 ,Fe2(OH)24 and other polymeric ions and hydroxyl bridging in aqueous solution. With high flocculation capacity. The sedimentation rate is fast. Wide Application |
| Use | For the preparation of pigments, drugs, and used as mordant, water purification agent The role of polymeric ferric sulfate-used for raw water purification, sewage treatment, recycling, medicine, leather, sugar industry; A new type of efficient flocculant. It is mainly used for the purification of drinking water and industrial water. Can also be a variety of industrial wastewater and urban sewage (such as food, leather, mining, metallurgy, printing and dyeing, Paper, Petroleum and other wastewater) for purification |
10028-22-5 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37 - Irritating to eyes and respiratory system. |
| Safety Description | 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 9121 |
| WGK Germany | 3 |
| RTECS | NO8520000 |
| TSCA | Yes |
10028-22-5 - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Iron |
| Downstream Products | Ammonium iron (III) sulfate |
10028-22-5 - Reference
| Reference Show more | 1. [IF=9.297] Meng Li et al."Treatment of potato starch wastewater by dual natural flocculants of chitosan and poly-glutamic acid."J Clean Prod. 2020 Aug;264:121641 |
10028-22-5 - Nature
Open Data Verified Data
ferric sulfate is a yellowish white powder or a monoclinic crystal. Relative density (dl8)3.097. Easy to absorb moisture, soluble in water, aqueous solution was acidic reaction. Slightly soluble in ethanol, insoluble in acetone, ethyl acetate. The hydrolysis is slow in aqueous solution. The iron sulfate crystallizes from the aqueous solution into hydrate crystals with 12, 10, 9, 7, 6 or 3 water molecules. Nine hydrate is yellow, the relative density of 2.1,480 degrees Celsius decomposition, very soluble in water, 20 degrees Celsius 1009 water can dissolve 4409. Hydrate is easily weathered in Air
Last Update：2025-06-10 22:55:16
10028-22-5 - Preparation Method
Open Data Verified Data
ferric sulfate is obtained by dissolving ferric oxide in boiling sulfuric acid having a content of 75% to 80%. Or oxidation of pyrite with nitric acid.
Last Update：2025-06-10 22:55:16
10028-22-5 - Application
Open Data Verified Data
iron sulfate is used in the field of water treatment as a coagulant for water purification and a sludge treatment agent, and is mainly used in the purification treatment of drinking water and the purification treatment of industrial water, various industrial wastewaters, urban sewage, and the like. It has excellent turbidity removal, decolorization, oil removal, deodorization, sterilization, algae removal, phosphorus removal, grease removal, removal of COD, BOD and heavy metal ions. The use of ferric sulfate and ferric chloride mixture and calcium hydroxide to treat sludge discharged from sewage treatment plants can reduce the amount of sludge. Ferric sulfate can also be used as a raw material for the manufacture of alum and other iron salts and pigments, as an etchant for aluminum devices and as a scavenger for certain industrial gases, and as a biocide, it can also be used for the pickling of metals, especially stainless steel and copper. The acidic solution serves as an oxidizing medium for the extraction of useful components from the ore.
Last Update：2025-08-19 16:24:40
10028-22-5 - Safety
Open Data Verified Data
is a low toxicity product, and its acidic solution has a stimulating effect on the skin. When in contact with the skin, can be washed with water, non-combustible and non-explosive. In the storage and transportation, strict protection against toxic substances pollution, rain and moisture.
Last Update：2025-06-10 22:55:16
10028-22-5 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| product features | polyferric sulfate (hereinafter referred to as polyferric or SPFS) is an alkaline sulfate, which is a new generation of environmental protection products. it has a strong high price polynuclear polyferric complex ions, which have a strong ability to neutralize the charge on suspended particles, reduce the micelle potential, and make the gel stable at a higher potential, and hydrolyzed into flocculent hydroxyl iron compound, it has a larger specific surface area and strong adsorption capacity. Therefore, it is a new type of inorganic polymer coagulant. According to the product's own characteristics, compared with other inorganic flocculants, it has the characteristics of large flocs particles, fast sedimentation speed, easy stratification and clarification, and a wide range of applicable pH. It has the characteristics of suspended solids, organic matter, and sulfide in water., The removal effect of heavy metals is good, and it has the functions of decolorization, deodorization, demulsification and sludge dewatering, especially the COD removal function is greatly better than other water purification products. The product is non-toxic, less corrosive, and will not cause secondary pollution after use. It can be widely used in the turbidity removal of various industrial water and the treatment of industrial wastewater such as mining, printing and dyeing, papermaking, food, leather, etc. Compared with the traditional water purifier ferrous sulfate or aluminum sulfate, polyferric sulfate has the following characteristics: less dosage; strong adaptability, good results for various water quality conditions; fast flocculation speed, large alum flowers, and rapid sedimentation; It has the functions of decolorization, sterilization, removal of radioactive elements, reduction of heavy metal ions, reduction of COD and BOD; it is a cationic inorganic polymer flocculant with good use effects. Figure 1 is a yellow polymeric ferric sulfate powder |
| performance of polyferric sulfate | as a water treatment agent, polyferric sulfate has strong adaptability to various water quality, and has remarkable purification effect on micro-pollution, algae-containing, low-temperature and low-turbidity raw water, especially for high-turbidity raw water. The purified water quality is better than inorganic coagulants such as aluminum sulfate, and the cost of water purification is 15-30% lower than that of inorganic coagulants. Flocculation forms fast and settles fast. The water purification effect is excellent, the water quality is good, it does not contain harmful substances such as chlorine and heavy metal ions, and there is no water phase transfer of iron ions. It is non-toxic, harmless, safe and reliable. The range of PH value of the suitable water body is 4-11 and the range of PH value is 6-9. The change range of PH value and total alkalinity of purified raw water is small, and the corrosion to treatment equipment is small. The corrosion is small, the operating conditions are good, and the solubility is better than aluminum sulfate. The treated water has less salt, which is beneficial to ion exchange treatment and pure water preparation. It has excellent coagulation performance, dense alum flowers and fast sedimentation speed. In addition to turbidity, decolorization, deoiling, dehydration, sterilization, deodorization, algae removal, removal of COD, BOD and heavy metal ions in water and other significant effects. |
| The role of polymeric ferric sulfate | Polymeric ferric sulfate (PFS) is an inorganic polymer formed by inserting hydroxyl groups into the network structure of the ferric sulfate molecule family Flocculant can effectively remove suspended solids, organic matter, sulfide, nitrite, colloid and metal ions in water. Polyferric sulfate has the functions of deodorization, demulsification and sludge dewatering, and also has a good removal effect on planktonic microorganisms. The effect of PFS treatment of oily sewage is far more significant than that of ferrous sulfate, and it is less corrosive to metal equipment, but it produces more sludge and color in the effluent. |
| principle of action | Polyferric sulfate is one of the intermediate products of ferric sulfate in the hydrolytic flocculation process. Liquid polymeric ferric sulfate itself contains a large number of polymeric cations, such as [Fe3(OH)4]5, [Fe6(OH)12]6, [Fe4O(OH)4]6, etc., which exist in aqueous solution [Fe(H2O)6]3, [Fe2(H2O)3]3 and [Fe(H2O)2]3 and other complex cations. They are bridged by hydroxyl (OH) to form polynuclear complex ions, thereby forming huge inorganic polymer compounds with a relative molecular weight of up to 1 × 105. Due to the presence of the above complex ions, PFS can strongly adsorb colloidal particles and promote flocculation of particles through adhesion, bridging and cross-linking. At the same time, accompanied by a series of physical and chemical changes, it can neutralize the charge on the surface of colloidal particles and suspended solids, reduce the Zeta potential of the colloid, thereby destroying the stability of the micelles and causing the micelles to collide with each other to form flocculent precipitates. This flocculent precipitate has a large surface area and is extremely adsorptive. Due to the adsorption and destabilization of PFS, it has the function of adhesion and bridging, making it an inorganic polymer flocculant with superior performance. |
| phosphorus removal agent | polyferric sulfate has a phosphorus removal rate of above 95 when treating sewage, and the effect is obvious. what effect can polyferric sulfate play when removing phosphorus? Why is the phosphorus removal effect so good? Polymerized ferric sulfate is a kind of polymer coagulant. It is a new compound agent. It combines the major advantages of aluminum salt and iron salt. It can well remove various forms of phosphorus in the water body, and can also remove COD, BOD, SS and various organic matters, suspended solids, etc., and alum flower flocculates are large, with good grouping effect and compactness, so the flocculate is heavy and the sedimentation speed is fast, so the effect of treating water is good. There are two treatment methods for phosphorus-containing wastewater: 1. biological phosphorus removal method, most of the phosphorus can be removed; 2. chemical phosphorus removal method, chemical preparations and phosphorus in sewage are used for chemical reaction to produce precipitation, thereby removing phosphorus in sewage and producing purification effect on sewage; Polyferric sulfate phosphorus removal is currently a relatively common and effective phosphorus removal agent, so sewage phosphorus removal, polyferric sulfate is recommended. |
| production process | there are many production methods of polyferric sulfate, including air oxidation catalysis, iron sulfide slag pressurized acid dissolution method, potassium chlorate oxidation method, iron tetraoxide ore acid dissolution oxidation method, etc. 1. ferrous sulfate, a by-product in the production process of titanium dioxide, is generated. ferrous sulfate in acidic solution is oxidized to ferric ions by NO catalysis, and then sodium hydroxide is added for neutralization. after adjusting the degree of alkalinity, polymerization reaction occurs to produce 65.85 products. The reaction principle is as follows: 2NO + O2 → 2NO2 4FeSO4 +(2-n)H2SO4 + NO2 → Fe2(OH)m(SO4)3-n/2+2(1-n)H2O 2, the raw material is industrial sulfuric acid waste liquid, the catalyst is sodium nitrite, and pure oxygen is introduced into a closed container according to the ratio of (0.3-0.5):1, react at 55 to 90 degrees for 1.5-2 hours. This process is simple, the reaction is relatively mild, but the oxidation time is long, the price of the catalyst is high, the amount is large, and the reaction is accompanied by the discharge of nitrogen oxides, which causes environmental pollution. The use and promotion of this method are also limited by the toxicity of sodium nitrite. 3. add ferrous sulfate and sulfuric acid to the reaction kettle in turn, add water and stir to prepare a 18%-20% solution. When the temperature is raised to 50 degrees, oxygen is introduced, and the reaction pressure reaches 3.03 * 105Pa. First, add sodium nitrite, which is equivalent to 0.4%-1% of the dosage, then add sodium iodide as a cocatalyst, and react for 2-3 hours. Cooling and discharging, liquid products can be obtained, and the liquid is evaporated under reduced pressure, filtered, dried, and crushed to obtain solid. 4. preparation of polyferric sulfate by reaction tower method: at present, most of the domestic production of polyferric sulfate by cicada pupa reaction kettle method has defects such as long reaction cycle, equipment corrosion, heavy daily maintenance tasks, etc. In response to the appeal, the process of reaction tower production is now proposed and good results have been achieved. The method is to use a reaction tower made of corrosion-resistant materials according to the lifting point of the reaction of oxygen oxidation of ferrous sulfate. When the mixed liquid flows in the reaction tower, it forms a huge surface area, which strengthens the absorption of gas and accelerates the reaction speed. It can also be pressurized. The feeding part is to add ferrous sulfate, sulfuric acid, and water to the dissolution tank in proportion, heat up until ferrous sulfate is dissolved, inject it into the storage tank, use a corrosion-resistant pump to drive the same industry into the reaction tower, adjust the flow rate, and add oxygen and catalyst at the same time. Detection of ferrous ions produced by catalytic oxidative polymerization. After the ferrous ions are completely oxidized, the reaction ends. Finally, the liquid finished product is injected into the finished product pool, and the remaining catalyst and oxygen can be used again next time. 5. potassium chlorate oxidation method: 6FeSO4 + KC1O3 +3H2SO4 → 3Fe(SO4)3 + KC1 + 3H2O This method has simple preparation process and mild reaction. The amount of oxidant is small, and no harmful gas is produced, but there are problems such as high price of potassium chlorate and potassium salt impurities. |
| solubility in water (g/100ml) | dissolved grams per 100ml of water: 440g/20 ℃ |
| use | used to make pigments and drugs, and used as mordant, water purifier, etc. used as iron salt inorganic polymer flocculant, mainly used in urban drinking water and industrial water supply used as analytical reagent, water purifier, iron catalyst and mordant used for silver analysis and regular determination of sugar. In haploid breeding, improved white medium was formulated, silver was analyzed, carbon, dye, ink, water purification, disinfection and polymerization catalyst were determined. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | abdominal cavity-mouse LD50: 168 mg/kg |
| flammability hazard characteristics | non-combustible; toxic iron-containing and sulfur oxide smoke from the fire site |
| storage and transportation characteristics | warehouse is low temperature, ventilated and dry; Moisture proof; Closed storage |
| fire extinguishing agent | carbon dioxide, dry powder, sand |
| occupational standard | TWA 1 mg (iron)/m3; STEL 2 mg (iron)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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View History
10028-22-5
38099-82-0
120466-66-2
629652-44-4
78900-02-4
96740-32-8
2-Chloroethylenephosphonic acid
促进剂M
BOC-TRP(CHO)
高纯氧
38099-82-0
120466-66-2
629652-44-4
78900-02-4
96740-32-8
2-Chloroethylenephosphonic acid
促进剂M
BOC-TRP(CHO)
高纯氧
Raw Materials for 10028-22-5
Downstream Products for 10028-22-5