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| CAS No.: | 7784-24-9 |
|---|---|
| Name: | Aluminium potassium sulfate dodecahydrate |
| Molecular Structure: | |
|
|
|
| Formula: | AlH24KO20S2 |
| Molecular Weight: | 474.37 |
| Synonyms: | Aluminumpotassium disulfate dodecahydrate;Aluminum potassium sulfate (AlK(SO4)2),dodecahydrate;Sulfuric acid, aluminumpotassium salt (2:1:1), dodecahydrate (8CI,9CI);Potassium alumdodecahydrate;Potassium aluminum disulfate dodecahydrate;Potassium aluminumsulfate dodecahydrate;Potassium aluminum sulfate dodecahydrate(KAl(SO4)2.12H2O);Aluminum potassium sulfate; |
| EINECS: | 233-141-3 |
| Density: | 1.757 g/cm3 |
| Melting Point: | 92 °C(lit.) |
| Boiling Point: | 330 °C at 760 mmHg |
| Solubility: | 140 G/L (20 °C) in water |
| Appearance: | white to colourless crystals |
| Hazard Symbols: |
 Xn,img src=/images/Xi.gif alt=Irritant >Xi
|
| Risk Codes: | 36/38-22-36/37/38-21/22 |
| Safety: | 22-24/25-37/39-26-36-20-13-2 |
| PSA: | 288.04000 |
| LogP: | -0.94850 |
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| Conditions | Yield |
|---|---|
| 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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Chemistry
Molecular Structure of Aluminium potassium sulfate dodecahydrate (CAS NO.7784-24-9):
IUPAC Name: Aluminum potassium disulfate dodecahydrate
Molecular Weight: 474.388398 g/mol
Molecular Formula: AlH24KO20S2
Melting Point: 92 °C(lit.)
Density: 1.757 g/mL at 25 °C(lit.)
Storage Temp.: store at RT.
Water Solubility: 140 G/L (20 °C)
Enthalpy of Vaporization: 62.94 kJ/mol
Boiling Point: 330 °C at 760 mmHg
Vapour Pressure: 3.35E-05 mmHg at 25 °C
Stability: Stable. Incompatible with steel, aluminium, copper, zinc, bases, strong oxidizing agents.
H-Bond Donor: 12
H-Bond Acceptor: 20
Exact Mass: 473.97548
MonoIsotopic Mass: 473.97548
Topological Polar Surface Area: 173
Heavy Atom Count: 24
Canonical SMILES: O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[K+]
InChIKey: GNHOJBNSNUXZQA-UHFFFAOYSA-J
EINECS: 233-141-3
Classification Code: Astringent [topical]; Reproductive Effect
Uses
The following is the usages of Aluminium potassium sulfate dodecahydrate (CAS NO.7784-24-9):
1.Rosin paper be used as the settlement agent, Cho-purification to help Shen agents, photographic paper hardener, foam. rubber to help blowing agents, such as dyeing mordant.
2.Leavening agent; buffer; neutralizer; curing agent.
3.Aluminum - chromium, aluminum - with formaldehyde tanning fur, dosage 15g / L.
4.The food industry can be dubbed in baking powder and baking soda is also used as a leavening agent.
5.Reagents used for chromatography, but also for staining of bacteria.
Production
Re-crystallization on industrial products by adding water-soluble potassium aluminum sulfate, and then after purification, in addition to impurities, filtration, concentration, crystallization, centrifugal dewatering, drying, potassium aluminum sulfate obtained.
Safety Profile
Hazard Codes: 
Xn, 
Xi
Risk Statements: 36/38-22-36/37/38-21/22
R36/38:Irritating to eyes and skin.
R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin.
R21/22:Harmful in contact with skin and if swallowed.
Safety Statements: 22-24/25-37/39-26-36-20-13-2
S22:Do not breathe dust.
S24/25:Avoid contact with skin and eyes.
S37/39:Wear suitable gloves and eye/face protection.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
S20:When using, do not eat or drink.
S13:Keep away from food, drink and animal foodstuffs.
S2:Keep out of the reach of children.
WGK Germany: 3
RTECS: WS5690000
Standards and Recommendations
ACGIH TLV: TWA 2 mg(Al)/m3
Specification
Aluminium potassium sulfate dodecahydrate (CAS NO.7784-24-9) is also named as Alum, Potassium ; Alum, potassium, dodecahydrate ; Aluminum potassium sulfate (1:1:2) dodecahydrate ; Aluminum potassium sulfate (AlK(SO4)2), dodecahydrate ; Aluminum potassium sulfate, dodecahydrate Kalinite ; Potash alum dodecahydrate ; Potassium alum dodecahydrate ; Potassium aluminum disulfate dodecahydrate ; Potassium aluminum sulfate dodecahydrate ; Potassium aluminum sulfate dodecahydrate (KAl(SO4)2.12H2O) ; Sulfuric acid, aluminum potassium salt (2:1:1), dodecahydrate ; UNII-1L24V9R23S . Aluminium potassium sulfate dodecahydrate (CAS NO.7784-24-9) is white to colourless crystals. It is soluble in water and dilute acid, insoluble in alcohol, acetone.