Aluminium potassium sulfate dodecahydrate #CAS7784-24-9
Aluminium potassium sulfate dodecahydrate #CAS7784-24-9
Aluminum potassium sulfate dodecahydrate is an inorganic sulfate salt of aluminum and potassium. Linear growth rates of (100), (111) and (110) faces of its crystals have been investigated.
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.
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.
Application of Aluminium potassium sulfate dodecahydrate
Potassium alum (alum) is a cosmetic astringent.
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.
| Aluminium potassium sulfate dodecahydrate Chemical Properties |
| Melting point | 92 °C(lit.) |
| Boiling point | 200°C |
| density | 1.757 g/mL at 25 °C(lit.) |
| bulk density | 900kg/m3 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: soluble0.5M, clear, colorless |
| form | Solid |
| Specific Gravity | 1.757 |
| color | White |
| Odor | Odorless |
| PH Range | 3.3 |
| PH | 3.0-3.5 (25℃, 50mg/mL in H2O) |
| Water Solubility | 140 G/L (20 ºC) |
| Thermal Conductivity | 2.092 W/(m·K) |
| Merck | 14,360 |
| Stability: | Stable. Incompatible with steel, aluminium, copper, zinc, bases, strong oxidizing agents. |
| Cosmetics Ingredients Functions | ASTRINGENT |
| InChI | 1S/Al.K.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4 |
| InChIKey | GNHOJBNSNUXZQA-UHFFFAOYSA-J |
| SMILES | O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O |
| LogP | -1.031 (est) |
| CAS DataBase Reference | 7784-24-9(CAS DataBase Reference) |
| NIST Chemistry Reference | potassium aluminum sulfate dodecahydrate(7784-24-9) |
| Safety Information |
| Hazard Codes | Xn,Xi |
| Risk Statements | 36/38-22-36/37/38-21/22 |
| Safety Statements | 22-24/25-37/39-26-36-20-13-2 |
| WGK Germany | 3 |
| RTECS | WS5690000 |
| TSCA | Yes |
| HS Code | 28332990 |
| Storage Class | 11 - Combustible Solids |
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