ALUM POTASSIUM
Aluminum potassium sulfate
CAS: 10043-67-1;15007-61-1;131315-49-6
Molecular Formula: AlKO8S2
ALUM POTASSIUM - Names and Identifiers
| Name | Aluminum potassium sulfate |
| Synonyms | alum,n.f. Potassium alum ALUM POTASSIUM Alum, potassium POTASSIUM ALUMINUM SULFATE ALUMINUM POTASSIUM SULFATE Aluminum potassium sulfate ALUMINIUM POTASSIUM SULFATE ALUMINIUM POTASSIUM SULPHATE Aluminium potassium sulphate dialuminum dipotassium sulfate aluminiumpotassiumbis(sulfate) Potassium aluminium sulfate,anhydrous 7784-24-9aluminiumpotassiumbis(sulphate) |
| CAS | 10043-67-1 15007-61-1 131315-49-6 |
| EINECS | 233-141-3 |
| InChI | InChI=1/2Al.2K.H2O4S/c;;;;1-5(2,3)4/h;;;;(H2,1,2,3,4)/q2*+3;2*+1;/p-2 |
ALUM POTASSIUM - Physico-chemical Properties
| Molecular Formula | AlKO8S2 |
| Molar Mass | 258.21 |
| Density | 1.725 g/cm3 |
| Water Solubility | g/100g H2O: 3.00 (0°C), 5.90 (20°C), 109 (90°C) [LAN05] |
| Solubility | Freely soluble in water, very soluble in boiling water;soluble in glycerol; practically insoluble in ethanol (96%). |
| Appearance | white hygroscopic powder |
| Merck | 13,359 |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | Colorless transparent block crystal or crystalline powder, odorless, slightly sweet and sour taste. The relative density is about 1.757 and the melting point is 92.5 °c. In dry air apoplexy lost water of crystallization, in humid air dissolved in water, heated to 92 · 5 ℃ lost 9 crystal water, 200% lost all crystal water into white powder. Soluble in water, the aqueous solution is acidic, in water hydrolysis to produce aluminum hydroxide colloidal precipitation; Slowly soluble in glycerol, insoluble in ethanol. Oral LD5035 ~ 50g/kg in dogs, oral LD505 ~ 10g/woman in cats, not specified by ADI (FAO/WHO,1994). |
| Use | Is the main raw material of baking powder, used as baking powder, additives |
ALUM POTASSIUM - Risk and Safety
| RTECS | WS5650000 |
ALUM POTASSIUM - Nature
Open Data Verified Data
colorless transparent crystal or white crystalline powder. The taste was slightly sweet and astringent. Melting Point: 92.5 ℃; Relative density: 1. 725. Soluble in water (Ig soluble in 7.2mL cold water, 0.3 ml boiling water), glycerol, acidic solution. Soluble in dilute acid, insoluble in ethanol, acetone. Stable at room temperature, when the temperature of 60~65 deg C, long-term contact with air easy weathering, loss of crystal water. When heated above 200 °c, the water of crystallization is lost and the product becomes anhydrous. The higher temperature releases S03, which can be weathered into an opaque state in the air, slowly soluble in glycerol, and practically insoluble in ethanol.
Last Update：2024-01-02 23:10:35
ALUM POTASSIUM - Preparation Method
Open Data Verified Data
industrial aluminum sulfate was dissolved in water. Additional potassium sulfate was dissolved in water. After filtration and mixing. It was evaporated on a water bath until crystallization occurred. The crystals were cooled with stirring and filtered off with suction. It was then dissolved in a minimal amount of hot water and cooled to crystallize. Recrystallization was performed as necessary until pure aluminum potassium sulfate was obtained.
Last Update：2022-01-01 09:00:12
ALUM POTASSIUM - Use
Open Data Verified Data
Analytical reagents for the detection of iron, manganese, antimony and aluminum. Also used for bacterial staining and photographic plate.
Last Update：2022-01-01 09:00:12
ALUM POTASSIUM - Safety
Open Data Verified Data
cat oral LDso:5 ~ lOg.kg-1. Packed in a plastic woven bag lined with a polyethylene plastic bag. 50kg net weight per bag. Should be stored in a ventilated, dry, clean warehouse. The package is sealed and moisture-proof. It is not allowed to be stored and mixed with toxic and hazardous substances. Transport should be protected from rain and sun exposure. Handle the package with care to prevent breakage. In case of fire, it can be suppressed by water, sand and all kinds of fire extinguishing.
Last Update：2022-01-01 09:00:13
ALUM POTASSIUM - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | refer to "15002, potassium alum". |
| use | as a water purifier, fruit and vegetable brittlering agent and leavening agent, China stipulates that it can be used in fried food, shrimp slices, bean products, baking powder, wafer biscuits, puffed food and aquatic products. it can be used appropriately according to production requirements, and the residual amount of aluminum shall not exceed 100 mg/kg. It is the main raw material of baking powder, used as baking powder and additive The acidic component of chemical leavening agent. For baked goods. Its water solubility is lower than that of potassium alum. Therefore, the reaction with sodium bicarbonate is slow, and carbon dioxide can be produced for a long time. This product may be slightly astringent when used in baked food, which is its disadvantage. |
| production method | potassium alum is heated on an aluminum plate (about 200 ℃) to remove crystal water. The temperature is too high to produce alumina. recrystallization method will be industrial aluminum potassium sulfate dissolved in water, after purification filtration, evaporation crystallization, separation, drying, screening products. Alunite method will be broken, roasting dehydration, weathering crushing, and then with steam (or hot water) leaching, sedimentation, crystallization of crude alum; then the crude alum with water to dissolve, boil, evaporate, cooling, crystallization, separation, drying to obtain the finished product. |
| category | toxic substances |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide |
| occupational standard | TWA 2 mg (aluminum)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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View History
ALUM POTASSIUM
Pentabromophenyl ether
LL-37 (trifluoroacetate salt)
Vaseline oil(Ⅰ)
Docosane-1-yltrimethylaminium·chloride
METHYL THIOCYANOFORMATE
马来酸氯苯那敏EP杂质A
双(三氟乙酰氧基)碘苯
(R)-Methyl-morpholin-3-ylmethyl-amine dihydrochlorde
9-[2-(二异丙基膦基)苯基]-9H-咔唑
Pentabromophenyl ether
LL-37 (trifluoroacetate salt)
Vaseline oil(Ⅰ)
Docosane-1-yltrimethylaminium·chloride
METHYL THIOCYANOFORMATE
马来酸氯苯那敏EP杂质A
双(三氟乙酰氧基)碘苯
(R)-Methyl-morpholin-3-ylmethyl-amine dihydrochlorde
9-[2-(二异丙基膦基)苯基]-9H-咔唑