Aluminium sulfate octadecahydrate
- CAS No.
- 7784-31-8
- Chemical Name:
- Aluminium sulfate octadecahydrate
- Synonyms
- ALUM;ALUMINUM SULFATE OCTADECAHYDRATE;Aluminum sulfate octahydrate;KH2PO27;CAKE ALUM;PICKLE ALUM;PATENT ALUM;octadecahydrate;Trade termforalum;Aluminum triethide
- CBNumber:
- CB5435191
- Molecular Formula:
- Al2H36O30S3
- Molecular Weight:
- 666.43
- MDL Number:
- MFCD00149136
- MOL File:
- 7784-31-8.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 86 °C |
|---|---|
| Density | 1,69 g/cm3 |
| bulk density | 820kg/m3 |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | 364g/l |
| form | Powder/Solid |
| color | White |
| Specific Gravity | 1.69 |
| PH Range | 3 - 4 |
| PH | 2.5-4.0 (20g/l, H2O, 20℃) |
| Water Solubility | Soluble |
| Sensitive | moisture sensitive |
| InChI | InChI=1S/2Al.3H2O4S.18H2O/c;;3*1-5(2,3)4;;;;;;;;;;;;;;;;;;/h;;3*(H2,1,2,3,4);18*1H2/q2*+3;;;;;;;;;;;;;;;;;;;;;/p-6 |
| InChIKey | AMVQGJHFDJVOOB-UHFFFAOYSA-H |
| SMILES | S([O-])([O-])(=O)=O.S([O-])([O-])(=O)=O.S([O-])([O-])(=O)=O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3] |
| CAS DataBase Reference | 7784-31-8(CAS DataBase Reference) |
| NCI Dictionary of Cancer Terms | alum |
| FDA UNII | TCS9L00G8F |
| ATC code | S01XA07 |
| EPA Substance Registry System | Sulfuric acid, aluminum salt (3:2), octadecahydrate (7784-31-8) |
| UNSPSC Code | 12352302 |
| NACRES | NB.24 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS05 |
|---|---|
| Signal word | Danger |
| Hazard statements | H290-H318 |
| Precautionary statements | P280-P305+P351+P338+P310 |
| Hazard Codes | N-Xn,Xi,N,Xn |
| Risk Statements | 51/53-41-36/37/38-22 |
| Safety Statements | 61-37/39-29-26-39 |
| RIDADR | UN3260 - class 8 - PG 3 - RQ - Corrosive solid, acidic, inorganic, n.o.s., HI: all |
| WGK Germany | 1 |
| RTECS | WS5697000 |
| HS Code | 2833 22 00 |
| Storage Class | 8B - Non-combustible corrosive hazardous materials |
| Hazard Classifications | Eye Dam. 1 Met. Corr. 1 Skin Corr. 1A |
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg |
Aluminium sulfate octadecahydrate price More Price(58)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 11044 | Aluminum sulfate octadecahydrate puriss., meets analytical specification of Ph. Eur., BP, 100-110%, 51.0-59.0% Al2(SO4)3 basis | 7784-31-8 | 1kg | $133 | 2026-04-30 | Buy |
| Sigma-Aldrich | 11044 | Aluminum sulfate octadecahydrate puriss., meets analytical specification of Ph. Eur., BP, 100-110%, 51.0-59.0% Al2(SO4)3 basis | 7784-31-8 | 6x1kg | $535 | 2025-07-31 | Buy |
| Sigma-Aldrich | AX0735 | Aluminum Sulfate, Octadecahydrate Meets ACS Specifications GR ACS | 7784-31-8 | 500g | $265 | 2022-05-15 | Buy |
| Sigma-Aldrich | AX0745 | Aluminum Sulfate, Octadecahydrate | 7784-31-8 | 5KG | $449 | 2022-05-15 | Buy |
| Sigma-Aldrich | AX0735 | Aluminum Sulfate, Octadecahydrate Meets ACS Specifications GR ACS | 7784-31-8 | 2.5kg | $1040 | 2022-05-15 | Buy |
Aluminium sulfate octadecahydrate Chemical Properties, Uses, Production
Uses
The compound is used heavily in the paper industry. In its acidic solution form, which contains a slight excess of H2SO4, it is used for pH control of pulp slurries, treatment of process waters, setting of dyes and also for precipitating dissolved resin for setting the size on the fibers. In slight basic form (containing a slight excess of Al2O3), it is used for treatment of drinking and waste waters (e.g., for reducing phosphorus content). Other major applications include dyeing, tanning, catalysts, modification of concrete, and in the manufacture of various chemicals and pharmaceutical products.
Preparation
Prepared from bauxite, kaolin or aluminum compounds on reaction with H2SO4. The insoluble silicic acid is filtered out; the hydrate salt forms on crystallization.
Chemical Properties
white crystalline powder and chunks
Physical properties
White crystal; sweet taste; density 1.62 g/cm3: decomposes at 86.5°C; soluble in water.
Uses
Aluminium sulfate octadecahydrate is a preservative, the inclusive term for several inum-type compounds such as inum sulfate and inum potassium sulfate. It is used with edta to prevent discoloration of potatoes and to maintain the firmness of shrimp packs. It is also used in pickles and pickle relish.
Definition
ChEBI: A hydrate resulting from the the formal combination of anhydrous aluminium sulfate with approximately 18 mol eq. of water. The commercial product usually contains 5-10% less water than theory. It is one of the commonest hydrates of aluminium sulfate.
reaction suitability
reagent type: catalyst
core: aluminum
Aluminium sulfate octadecahydrate Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Beijing CommScope Huiwei Technology Co., Ltd | 010-67777729 18810111057 | 2462714774@qq.com | China | 58 | 58 |
| Tianjin Jinhui Taiya Chemical Reagent Co., Ltd | 022-59582624 18622766592 | 2163746375@qq.com | China | 271 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
| Adamas Reagent, Ltd. | 400-6009262 15618770481 | yhx@titansci.com | China | 14098 | 59 |
| Shandong Xiya Chemical Co., Ltd | 13355009207 13355009207 | 3007715519@qq.com | China | 18722 | 57 |
| Tianjin heowns Biochemical Technology Co., Ltd. | 400 638 7771 | sales@heowns.com | China | 14412 | 57 |
| Sinopharm Chemical Reagent Co,Ltd. | 86-21-63210123 | sj_scrc@sinopharm.com | China | 9791 | 79 |
| Maya High Purity Chemicals | +86 (573) 82222445 (0)18006601000 452520369 | sales@maya-r.com | China | 11693 | 57 |
View Latest Price from Aluminium sulfate octadecahydrate manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-06-30 | Aluminium sulfate octadecahydrate
7784-31-8
|
1kg | 99% | 10000KGS | Shaanxi Dideu New Materials Co. Ltd | ||
 |
2026-05-28 | Aluminium sulfate octadecahydrate
7784-31-8
|
$1.00 | 10KG | 99 % | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD | |
 |
2026-03-20 | Aluminium sulfate octadecahydrateLEATE
7784-31-8
|
$10.00 | 1KG | 99% | 10 mt | Hebei Chuanghai Biotechnology Co., Ltd |
-
- Aluminium sulfate octadecahydrate
7784-31-8
- $0.00
- 99%
- Shaanxi Dideu New Materials Co. Ltd
-
- Aluminium sulfate octadecahydrate
7784-31-8
- $1.00
- 99 %
- Hebei Chuanghai Biotechnology Co,.LTD
-
- Aluminium sulfate octadecahydrateLEATE
7784-31-8
- $10.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
