7784-24-9
Aluminum potassium disulfate dodecahydrate
CAS: 7784-24-9
Molecular Formula: AlH8KO5S
7784-24-9 - Names and Identifiers
| Name | Aluminum potassium disulfate dodecahydrate |
| Synonyms | POTASSIUM ALUM POTASSIUM AMMONIUM SULFATE POTASSIUM ALUM DODECAHYDRATE POTASSIUM ALUMINIUM SULFATE 12-WATER POTASSIUM ALUM SULFATE, DODECAHYDRATE aluminumpotassiumdisulfatedodecahydrate POTASSIUM ALUMINUM SULFATE DODECAHYDRATE aluminum potassium sulfate dodecahydrate Aluminium potassium sulfate dodecahydrate POTASSIUM ALUMINIUM SULFATE DODECAHYDRATE Aluminum potassium disulfate dodecahydrate |
| CAS | 7784-24-9 |
| EINECS | 616-521-7 |
| InChI | InChI=1/Al.K.H2O4S.12H2O/c;;1-5(2,3)4;;;;;;;;;;;;/h;;(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;/p-2 |
7784-24-9 - Physico-chemical Properties
| Molecular Formula | AlH8KO5S |
| Molar Mass | 186.2 |
| Density | 1.757g/mLat 25°C(lit.) |
| Melting Point | 92°C(lit.) |
| Boling Point | 200°C |
| Water Solubility | 140 G/L (20 ºC) |
| Solubility | Soluble in glycerin, insoluble in ethanol |
| Appearance | Colorless transparent crystal or white crystalline powder |
| Specific Gravity | 1.757 |
| Color | White |
| Odor | Odorless |
| Merck | 14,360 |
| PH | 3.0-3.5 (25℃, 50mg/mL in H2O) |
| Storage Condition | 密封包装，防潮，于阴凉、干燥处保存，不能与有毒、有害物混运。 |
| Stability | Stable. Incompatible with steel, aluminium, copper, zinc, bases, strong oxidizing agents. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00149143 |
| Physical and Chemical Properties | The characters of colorless and transparent were cubic eight-sided crystal or monoclinic cubic crystal. melting point 92.5 ℃ relative density 1.757 solubility soluble in water. Soluble in hot water. Soluble in dilute acid. Insoluble in alcohol and acetone. The aqueous solution was acidic. |
| Use | Used as hard film agent, water purification agent, mordant, sizing agent, tanning agent and food additives |
| Caution | Non hazardous materials. Avoid contact with skin and eyes. |
7784-24-9 - Risk and Safety
| Risk Codes | 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 Description | 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 |
| TSCA | Yes |
| HS Code | 28332990 |
7784-24-9 - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Ammonium sulfate Potassium Sulphate Aluminum sulfate Ammonium Bicarbonate |
| Downstream Products | Aluminium stearate |
7784-24-9 - Reference
| Reference Show more | 1. [IF=3.196] Yue He et al."Infrared spectroscopic identification of mineral drugs in herbal preparations with thermogravimetry-guided thermal separation–A case study of alum in a herbal powder for oral ulcer."J Mol Struct. 2022 Feb;1249:131581 |
7784-24-9 - Introduction
Gold phase analysis and determination of iron, manganese, antimony and aluminum in metallurgy. Mordant. Bacterial staining. Hardener in microscopy.
Last Update：2022-10-16 17:28:47
7784-24-9 - Preparation method
Open Data Verified Data
1. Natural Alumnite Processing Method
Crushing alum stone, roasting, dehydration, weathering, steam leaching, precipitation, crystallization, and crushing to produce aluminum potassium sulfate finished product.
2. Bauxite method
Decompose bauxite ore with sulfuric acid to obtain aluminum sulfate solution, then add potassium sulfate for reaction, filter and crystallize, centrifuge and dehydrate, and dry to obtain the product.
3. Recrystallization method
Coarse alum is boiled with water, evaporated, crystallized, separated, and dried to obtain the finished product.
4. Aluminum hydroxide method
Dissolve 0.22 tons of Al (OH) 3 in 0.35 tons of sulfuric acid, boil crude alum with water, add 0.23 tons of potassium sulfate solution, heat and react, filter, concentrate, crystallize, centrifuge, and dry to obtain the finished product.
Last Update：2024-01-02 23:10:35
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Raw Materials for 7784-24-9
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