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Aluminium potassium sulfate dodecahydrate Manufacturer/High quality/Best price/In stock
Cas No: 7784-24-9
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
Factory supply Aluminium potassium sulfate dodecahydrate Cas 7784-24-9 with high quality
Cas No: 7784-24-9
USD $ 4.0-5.2 / Kilogram 200 Kilogram 4000 Metric Ton/Year Wuhan Fortuna Chemical Co.,Ltd Contact Supplier
Aluminium potassium sulfate dodecahydrate
Cas No: 7784-24-9
No Data 1 Kilogram 20 Metric Ton/Quarter Henan Allgreen Chemical Co.,Ltd Contact Supplier
High Quality 99% Aluminium potassium sulfate dodecahydrate 7784-24-9 ISO Producer
Cas No: 7784-24-9
USD $ 0.1-0.1 / Gram 1 Gram 100 Metric Ton/Year Xi'an Xszo Chem Co., Ltd. Contact Supplier
Factory Supply Aluminum Potassium Disulfate Dodecahydrate
Cas No: 7784-24-9
No Data 1 1 Ality Chemical Corporation Contact Supplier
Manufacturer high quality aluminium potassium sulfate CAS NO.: 7784-24-9
Cas No: 7784-24-9
USD $ 60.0-80.0 / Kilogram 1 Kilogram 5000 Metric Ton/Month Xi'an Julong Bio-Tech Co., Ltd. Contact Supplier
Aluminum potassium disulfate dodecahydrate
Cas No: 7784-24-9
USD $ 1.0-1.0 / Kilogram 1 Kilogram 1000 Metric Ton/Year Henan Sinotech Import&Export Corporation Contact Supplier
Cas No: 7784-24-9
No Data 1 Kilogram 1000 Kilogram/Week Henan Tianfu Chemical Co., Ltd. Contact Supplier
lump Potash alum/aluminum potassium sulfate (cas.no:7784-24-9)
Cas No: 7784-24-9
No Data 100 Gram 20000 Kilogram/Day Hubei XinRunde Chemical Co., Ltd Contact Supplier
Wholesale price CAS 7784-24-9 with best price
Cas No: 7784-24-9
USD $ 139.0-210.0 / Kilogram 1 Kilogram 1000 Kilogram/Day Zhuozhou Wenxi import and Export Co., Ltd Contact Supplier

7784-24-9 Usage


Store in a cool, dry place in tightly closed containers. Stable under normal temperatures and pressures. When kept for a long time at 60–65°C (or over sulfuric acid) potassium alum dodecahydrate loses water, which is reabsorbed on exposure to air. It becomes anhydrous at about 200°C.

Health Hazard

Prolonged periods of exposure to aluminum and dust cause symptoms of toxicity that include, but are not limited to, coughing, wheezing, shortness of breath, memory loss, learning diffi culty, loss of coordination, disorientation, mental confusion, colic, heartburn, fl atulence, and headaches. Chronic exposures to alumina dust cause irritation to the eyes,


Aluminium potassium sulfate dodecahydrate is a white crystal that is soluble in water. It is made by roasting alunite in a furnace and then harvesting the product by crystallization. Aluminium potassium sulfate dodecahydrate was used to harden gelatin emulsions by introduction, by bathing the exposed plates prior to development, or by use in the fixing bath. Mixed with citric or other acids, it was also used as a clearing bath to remove developer stains in negatives.


Potassium alum is incompatible with strong oxidizing agents, aluminum, copper, steel, and zinc. When it is dispensed in powders with phenol, salicylates, or tannic acid, gray or green colors may be developed owing to traces of iron in the alum.


ChEBI: A hydrate resulting from the the formal combination of anhydrous potassium aluminium sulfate with 12 mol eq. of water.


A group of double salts withthe formula A2SO4.B2(SO4)3.24H2O,where A is a monovalent metal and Ba trivalent metal. The original examplecontains potassium and aluminium(called potash alum orsimply alum); its formula is oftenwritten AlK(SO4)2.12H2O (aluminiumpotassium sulphate-12-water). Ammoniumalum is AlNH4(SO4)2.12H2O,chrome alum is KCr(SO4)2.12H2O, etc.The alums are isomorphous and canbe made by dissolving equivalentamounts of the two salts in waterand recrystallizing.


potassium alum (alum) is a cosmetic astringent.

Chemical Properties

Aluminum is the most commonly available element in homes and workplaces. Aluminum is readily available for human ingestion through the use of food additives, antacids, buffered aspirin, astringents, nasal sprays, and antiperspirants; from drinking water; from automobile exhaust and tobacco smoke; and from using aluminum foil, aluminum cookware, cans, ceramics, and fi reworks. Workers who are at risk for toxicity are those in refi neries, foundries and also welders and grinders.

Chemical Properties

The PhEur 6.0 describes potassium alum as a granular powder, or colorless, transparent, crystalline masses. The JP XV describes it as colorless or white crystals or powder. Potassium alum is odorless and has a slightly sweet, strongly astringent taste.

Production Methods

Potassium alum is manufactured by treating bauxite with sulfuric acid and then potassium sulfate. Alternatively, aluminum sulfate is reacted with potassium sulfate.

Chemical Properties

white to colourless crystals

Purification Methods

Crystallise it from weak aqueous H2SO4 (ca 0.5mL/g). Its solubility (%) in H2O is 5.7 (0o), 12.0 (20o) and 136.9 (100o).


Aminocarb decomposes on heating and produces toxic fumes, irritating fumes, and oxides of nitrogen. During handling of aminocarb workers should wear protective clothing, gloves, face shield, breathing protection and avoid open flames.


Potassium alum is often included in preparations used as mouthwashes or gargles and in dermatological preparations. Large doses of potassium alum act as an irritant and may be corrosive; gum necrosis and gastrointestinal hemorrhage have occurred. Acute encephalopathy has been reported following bladder irrigation with alum solutions in the treatment of bladder hemorrhage. Anecdotal evidence suggests that this practice should be avoided for patients with renal insufficiency.

Regulatory Status

GRAS listed. Included in the FDA Inactive Ingredients Database (vaginal; suppository). Included in medicines licensed in the UK.


Buffer; floccculating reagent.

Pharmaceutical Applications

Potassium alum precipitates proteins and is a powerful astringent. The ability to precipitate proteins is utilized in the manufacture of vaccines, where purified proteins are coprecipitated with and adsorbed onto potassium alum. Potassium alum is often included in preparations used as mouthwashes or gargles and in dermatological preparations, and it may be used as a topical hemostatic, either as a solid or as a solution. Intravesical instillation of potassium alum, typically as a 1% solution, has been used for hemorrhagic cystitis.

7784-24-9 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Alfa Aesar (36288)  Aluminum potassium sulfate dodecahydrate, ACS, 98.0-102.0%    7784-24-9 500g 702.0CNY Detail
Alfa Aesar (36288)  Aluminum potassium sulfate dodecahydrate, ACS, 98.0-102.0%    7784-24-9 2kg 1499.0CNY Detail
Sigma-Aldrich (237086)  Aluminumpotassiumsulfatedodecahydrate  ACS reagent, ≥98% 7784-24-9 237086-100G 469.17CNY Detail
Sigma-Aldrich (237086)  Aluminumpotassiumsulfatedodecahydrate  ACS reagent, ≥98% 7784-24-9 237086-500G 1,271.79CNY Detail
Sigma-Aldrich (237086)  Aluminumpotassiumsulfatedodecahydrate  ACS reagent, ≥98% 7784-24-9 237086-2.5KG 4,513.86CNY Detail
Sigma-Aldrich (12623)  Aluminumpotassiumsulfatedodecahydrate  puriss., meets analytical specification of Ph.?Eur., BP, 99.0-100.5% (calc. on dry substance) 7784-24-9 12623-6X1KG 3,008.07CNY Detail
Sigma-Aldrich (12623)  Aluminumpotassiumsulfatedodecahydrate  puriss., meets analytical specification of Ph.?Eur., BP, 99.0-100.5% (calc. on dry substance) 7784-24-9 12623S-25KG 3,707.73CNY Detail
Sigma-Aldrich (31242)  Aluminumpotassiumsulfatedodecahydrate  puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5% 7784-24-9 31242-500G 1,568.97CNY Detail
Sigma-Aldrich (31242)  Aluminumpotassiumsulfatedodecahydrate  puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5% 7784-24-9 31242-1KG 1,879.02CNY Detail
Sigma (A6435)  Aluminumpotassiumsulfatedodecahydrate  BioReagent, suitable for insect cell culture 7784-24-9 A6435-100G 547.56CNY Detail
Sigma-Aldrich (A7210)  Aluminumpotassiumsulfatedodecahydrate  BioXtra, ≥98.0% 7784-24-9 A7210-100G 795.60CNY Detail
Sigma-Aldrich (A7210)  Aluminumpotassiumsulfatedodecahydrate  BioXtra, ≥98.0% 7784-24-9 A7210-500G 2,446.47CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017


1.1 GHS Product identifier

Product name potassium aluminium sulfate dodecahydrate

1.2 Other means of identification

Product number -
Other names POTASH ALUM

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:7784-24-9 SDS

7784-24-9Synthetic route

potassium alum

potassium alum



KAl(S(18)O4)2*12H2O, α

KAl(S(18)O4)2*12H2O, α

In water byproducts: KAl(S(16)O(18)O3)2*12H2O, KAl(S(16)O4)2*12H2O; addn. of 10% of 98% O-18 enriched K2SO4 to normal alum, evapn. to dryness; impurities detected by Raman;

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