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Aluminium sulfate

Common aluminum salt Physical and Chemical Properties Purpose and effect of aluminum sulfate Reference quality standards Aluminum sulfate binder Solubility in water (g / 100ml) Identification test Content Analysis Toxicity Uses The method of producing Category Toxicity grading Acute oral toxicity Flammability hazard characteristics Storage characteristics extinguishing agents
Aluminium sulfate
Aluminium sulfate
Chemical Name:
Aluminium sulfate
ALUM;NA-9078;pearlalum;filteralum;ALUMSLUDGE;LIQUID ALUM;Alunogenite;aluminumalum;Aluminiumsulfat;ALUMINUM SULFATE
Molecular Formula:
Formula Weight:
MOL File:

Aluminium sulfate Properties

Melting point:
770 °C (dec.)(lit.)
2.71 g/mL at 25 °C(lit.)
Powder and/or Chunks
Water Solubility 
CAS DataBase Reference
10043-01-3(CAS DataBase Reference)
EPA Substance Registry System
Sulfuric acid, aluminum salt (3:2)(10043-01-3)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi,N
Risk Statements  37/38-41-51/53-36/37/38
Safety Statements  26-39-61-37/39-29
RIDADR  UN 1760/3077
WGK Germany  1
RTECS  BD1700000
Hazardous Substances Data 10043-01-3(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Aluminium sulfate price More Price(7)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 202614 Aluminum sulfate 99.99% trace metals basis 10043-01-3 5g $69.7 2017-11-08 Buy
Sigma-Aldrich 202614 Aluminum sulfate 99.99% trace metals basis 10043-01-3 25g $234 2017-11-08 Buy
Alfa Aesar 44563 Aluminum sulfate, anhydrous, 99.99% (metals basis) 10043-01-3 25g $141 2017-11-08 Buy
Alfa Aesar 44563 Aluminum sulfate, anhydrous, 99.99% (metals basis) 10043-01-3 5g $44.6 2017-11-08 Buy
Sigma-Aldrich 202614 Aluminum sulfate 99.99% trace metals basis 10043-01-3 100g $709 2017-11-08 Buy

Aluminium sulfate Chemical Properties,Uses,Production

Common aluminum salt

Aluminum sulfate is a one of common aluminum salt, prone to hydrolyze, aqueous solution is acid. Added to the solution of soluble carbonates or sulfides will lead to complete hydrolysis:
(1)2Al3++3CO2-3+2H2O=2Al(OH)3↓+3CO2↑ (2)2Al3++3S2-+3H2O=2Al(OH)3↓+3H2S↑
Produce a white flocculent precipitate aluminum hydroxide sediment, when heated it expands violently, becomes spongy substance. Calcined to red heat, then it will be decomposed into sulfur trioxide and alumina.
Aluminum sulfate solution and potassium sulfate solution were mixed, to crystallize, to obtain a new kind of salt called potassium aluminum sulfate K2SO4 · Al2 (SO4) 3 · 24H2O, this salt is called complex salt, also known as aluminum potassium alum, commonly known as alum. From the composition point of view, it is formed by the adduct of two simple salt, is not a simple mixture of the two salt, but the compound of the same crystal structure, certain composition. The difference between complex salt and complexe is that in the solid state or solution complex salt presents simple ions, without complex ions.
Aluminum sulfate and other soluble sulfate, can also form another double salt, the formula of which is M2ⅠSO4MⅡSO4 · 6H2O and MⅠ2SO4M2Ⅲ (SO4) 3 · 24H2O. Where MⅠ typically is NH + 4, Na +, K +, Rb +, Cs +, Tl +.MⅡ1 is Fe2 +, Co2 +, Ni2 +, Zn2 +, Cu2 +, Hg 2+; MuⅢ1 is Fe 3+, Cr3 +, Al3 +, etc. This type of complex salt, collectively known as alum, for example: the molar salt (NH4) 2SO4 · FeSO4 · 6H2O, magnesium potassium sulfate K2SO4 · MgSO4 · 6H2O, chromium potassium sulfate K2SO4 · Cr2 (SO4) 3 · 24H2O, sodium alum Na2SO4 · Al2 ( SO4) 3 · 24H2O, alum, ammonium (NH4) 2SO4 · Al (SO4) 3 · 24H2O, etc. These classes of alum, solubility in water is much smaller than their corresponding sulfates composition, and thus the crystallization from solution, it is easy to get a more complete crystal particles, easily purified. This step of preparing alum is often used for purification of aluminum sulfate or preparation of relatively pure aluminum compound. The class of Alum in the industry has a wide range of uses, alum can be used to clean drinking water, also used for tanning leather, printing and dyeing, papermaking and other industries. Aluminum, aluminum oxide or aluminum hydroxide with sulfuric acid can be prepared for aluminum sulfate.
The above information is edited by the chemicalbook of Yan Yanyong.

Physical and Chemical Properties

Colorless or white crystals. Odorless, slightly sweet taste. Because of containing iron etc, industrial product looks like a yellowish-green, tastes sour. It was Stable in the air, heated to 250 ℃ to lose crystal water, when heated above 700 ℃, begin decompose into aluminum oxide, sulfur trioxide and water vapor, etc. Soluble in water, aqueous solution is acidic. Al2 (SO4) 3 + 2H2O → Al2 (SO4) 2 (OH) 2 + H2SO4, when hydrate were heated, violently swell and become spongy, when heated to a red heat, it decomposes into sulfur trioxide and alumina. Flocculent or sponge-like Al (OH) 3 has a strong adsorption capacity, good absorption of pigments and fibers, and thus used as a mordant in dyeing industry, also used to purify drinking water. In addition, in the paper industry, it can added to the pulp with rosin simultaneously for fiber bonding.
Aluminum sulfate has Anhydride and a variety of patterns of hydrate existing (16,18,27, etc). Among aluminum sulfate, the more stable is anhydrous aluminum sulfate [1] and 18 hydrated aluminum sulfate [2]. [1] is a colorless orthorhombic crystals, shiny, or white crystalline powder. Relative molecular mass is 342.15. The relative density is 2.71. Gradually heating to melt, it begins to lose crystal water at 250 ℃, decompose at 770 ℃. The refractive index is 1.47. Dissolved in water, slightly soluble in ethanol, aqueous solution is acidic. Solubility in water: 37.9 at 0 ℃, 38.1 at 10 ℃, 38.5 at 25 ℃, 38.9 at 30 ℃, 40.4 at 40 ℃,44.9 at 60 ℃, 48.8 at 70 ℃, 89 at 100 ℃. [2] is a colorless monoclinic needles. Relative molecular mass is 666.43. The relative density is 1.69 (17/4 ℃). decompose at 86.5 ℃. Dissolved in water, not soluble in ethanol. The solubility in water is 86.9 at 0 ℃, 1104 at 100 ℃. Aqueous solution is acidic due to hydrolysis.
Aluminum sulfate easily absorb water to agglomerate, use plastic bags lined with plastic bags of glass for packaging. Storage and transportation should prevent rain and damp.

Purpose and effect of aluminum sulfate

Aluminum sulfate is mainly used for turbidity water purification, also used as a precipitating agent, fixing agent, fillers, etc. It is used as antiperspirant cosmetic ingredients (astringent) in cosmetics. In addition, aluminum sulfate can also be used as paper industry sizing agent (rosin sizing, so that the color will be attached to the paper), leather tanning agents, mordant, purifying agent (flocculant, the resulting aluminum hydroxide floc may be coated with microparticles suspended in the water to promote rapid sedimentation separation), foam fire extinguisher inside agent (outside agent is sodium bicarbonate, carbon dioxide is generated after the reaction), raw materials for manufacturing alum, and white aluminum, oil bleaching, deodorization agent; pharmaceutical raw materials, as food curing agent (excipient); for impurities removal of oil, water, etc, pasteurized albumin stabilizer, lake raw materials, waste water treatment agent, waterproof concrete materials, fireproof raw materials.

Reference quality standards

Aluminum sulfate Quality Standards (HG1-32-77)
Aluminum sulfate Quality Standards (HG1-32-77)
1, All levels of refined aluminum sulfate can be used for producing all levels of precipitation paper sizing agents, class A, B and C is used for water purification, in which arsenic (AS2O3) content should be not more than 0.01%.
2, Aluminum sulfate size: all through the 10 mm mesh sieve, among which the 8 mm sieve fine is not less than 98%, but can also be made bulk product according to user`s requirements.
3, Appearance and color of refined aluminum sulfate is white.
4, All levels of crude aluminum sulfate can be used for water purification, aluminum sulfate used for purification can not be produced by waste acid toxic substances.
5, Aluminum sulfate used in paper sizing, Al2O3 content should be more than 12%, iron content less than 0.2%, insolubles should be not more than 0.5%. Fine paper production requires iron content of aluminum sulfate should be less than 0.08%, this kind of aluminum sulfate is called iron-free aluminum sulfate.

Aluminum sulfate binder

Aluminum sulfate refractory binder is a kind of binding agents. It is industrial aluminum sulfate produced through decomposition of bauxite with sulfuric acid or decomposition of aluminum hydroxide with sulfuric acid, obtained by hydrolysis.
Hardening mechanism of combination of aluminum sulfate binder is more complex, aluminum sulfate solution at room temperature exhibits SO42-, Al (OH) 2+ and Al (SO4) 3 and other states. If left coagulant, coagulated slowly or not solidified. After adding coagulant, such as after adding a coagulant alumina cement, SO42-will seize Ca2 + of alumina cement to form CaSO4, and also form iron sulfate, and magnesium sulfate, etc. The interaction between them would form sulphoaluminate (3CaO · Al2O3 · 3CaSO4 · 31H2O or 3CaO · Al2O3 · CaSO4 · 12H2O) and ferric sulfate (FeO · Al2O3 · 4SO3 · 22H2O) and other precipitation crystallization of new substances, prompting condensation and hardening of combination.
Due to the small number of new product, aluminum sulfate binding agent combination, it is very low intensity at room temperature. Before 500~600 ℃ and after drying heat, treatment intensity strength approaches. When at 700~800 ℃, as aluminate sulfate and sulphoaluminate begin to decompose, releasing SO3, [Al2 (SO4) 3-→ Al2O3 + 3SO3 ↑] to make the body produce binding loose structure, strength decreases. When above 1000 ℃, as the decomposition of aluminate sulfate and sulphoaluminate , the active Al2O3, prone to solid phase reaction, producing new substances and emergence of a liquid phase sintering, the strength improved significantly. when To 1200 ℃, the strength of combination is 3.5 to 5 times the strength of about 800 ℃.
Since aluminum sulfate hydrolysis reaction produces H2SO4, it can react with the raw material metal and oxide to produce hydrogen and water, adversely for brick material molding performance, so when aluminum sulfate binder ingredients are used for burndening, required at a certain temperature and humidity trapped material more than 24h .
Aluminum sulfate binder can be prepared castable, ramming material, plastic and unfired brick, ,etc. Its operating temperature varies as the aggregate and powder materials vary.

Solubility in water (g / 100ml)

Dissolved per 100 ml of water at different temperatures (℃) in grams:
31.2g/0 ℃; 33.5g/10 ℃; 36.4g/20 ℃; 40.4g/30 ℃; 45.8g/40 ℃
59.2g/60 ℃; 73g/80 ℃; 80.8g/90 ℃; 89g/100 ℃

Identification test

With 10% of the sample solution, the aluminum (IT-2) and sulfate (IT-29) test should be positive.
Solubility is measured by the OT-42 method, Easily soluble in water, insoluble in ethanol.
pH is measured with a glass electrode 5% aqueous solution, the value is 2.9 or more.

Content Analysis

The sample of about 4g is accurately weighed, put into a 250ml volumetric flask, dissolved in water and mixed in constant volume. The solution of 10ml is Drew, transferred into a 250ml beaker, adding 0.05mol/L disodium EDTA solution of 25.0ml and pH of 4.5 buffer (made by mixing ammonium acetate of 77.1g and acetic acid of 57ml , adding water to constant volume of 1000m1) 20ml, boiled by slow fire for 5min . After cooling, adding ethanol of 50ml and dithizone test solution (TS-94) of 2ml. Titration With 0.05mol/L zinc sulfate to the bright red rose, while conducting a blank titration. 0.05mol/L disodium EDTA equivalent amounts to aluminum sulfate [Al2 (SO4) 3] of 8.554mg, or aqueous aluminum sulfate [Al2 (S O4) 3 ·18H2O] of 16.66mg.


ADI not specified (FAO/WHO, 2001).
GRAS (FDA, §182.1125,2000).
LD50 6207mg/kg (mice, by mouth)


for the production of artificial stones and advanced ammonium alum.
curing agent (oil, water and the like with impurity), pasteurized albumin stabilizer (including liquid or frozen whole, egg yolk or protein). Maximum allowable amount (FAO/WHO, 1984) 0.036%.
for papermaking, water purification, and used as a mordant, tanning agents, astringent medicine, wood preservatives, foam fire extinguishing agent.

The method of producing

After aluminum hydroxide a post (or pure bauxite or kaolin) with sulfuric acid reacted, insolubles were filtered off and then crystallized.
Sulfuric acid production process is by grinding bauxite to a certain particle size, added into reactor for reaction with sulfuric acid, settling the reaction liquid, the supernatant was added sulfuric acid to neutral or slightly alkaline, then concentrated to about 115 ℃, solidified by cooling , crushing prepared products. A12O3 + 3H2SO4 → A12 (SO4) 3 + 3H2O


toxic substances

Chemical Properties

White powder

Toxicity grading



ChEBI: An aluminium sulfate that contains no water of crystallisation.

Acute oral toxicity

oral-mouse LD50: 6207 mg/kg; intraperitoneal-Mouse LD50: 1735 mg/kg

Flammability hazard characteristics

heat decomposition of toxic sulfur oxides, hydrolysis produces sulfuric acid, lung irritation

Storage characteristics

Treasury ventilation low-temperature drying

extinguishing agents

Foam, carbon dioxide, dry powder

General Description

Anhydrous aluminum sulfate is a white crystalline solid. Aluminum sulfate is also obtained as an 18-hydrate Al2(SO4)3.18H2O. Both forms are soluble in water, noncombustible, and nontoxic. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Aluminium sulfate is used in paper making, in firefighting foams, and in sewage treatment and water purification.

Air & Water Reactions

Dissolves in water with evolution of some heat. creates acidic solutions.

Reactivity Profile

Aqueous solutions of ALUMINUM SULFATE are acidic. The solid may corrode metals in presence of moisture.

Health Hazard

Inhalation of dust irritates nose and mouth. Ingestion of large doses causes gastric irritation, nausea, vomiting, and purging. Dust irritates eyes and skin.

Aluminium sulfate Preparation Products And Raw materials

Raw materials

Preparation Products

Aluminium sulfate Suppliers

Global( 184)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20810 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96820 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40398 62
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30309 84
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 China 3434 62
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 China 14833 55
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202,021-54302127,021-54308259,13764082696
+86-21-54291107 China 28712 64
Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
028-84752058 China 9742 57
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771 China 14544 57

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