aluminumammoniumalum
Sulfuric acid, aluminum ammonium salt (2:1:1)
CAS: 7784-25-0
Molecular Formula: AlH4NO8S2
aluminumammoniumalum - Names and Identifiers
| Name | Sulfuric acid, aluminum ammonium salt (2:1:1) |
| Synonyms | ǎn míng fán aluminumammoniumalum exsiccatedammoniumalum Aluminum ammonium alum aluminiumammoniumsulfate Ammonium Aluminum Sulfate aluminumammoniumdisulfate Aluminium ammonium sulfate aluminum ammonium disulfate monoammoniummonoaluminumsulfate sulfuricacid,aluminumammoniumsalt |
| CAS | 7784-25-0 |
| EINECS | 232-055-3 |
| InChI | InChI=1/Al.H3N.2H2O4S/c;;2*1-5(2,3)4/h;1H3;2*(H2,1,2,3,4)/q+3;;;/p-3 |
aluminumammoniumalum - Physico-chemical Properties
| Molecular Formula | AlH4NO8S2 |
| Molar Mass | 237.15 |
| Density | 1.64 |
| Melting Point | 93.5℃ |
| Boling Point | 330°C at 760 mmHg |
| Water Solubility | slightly soluble H2O; insoluble EtOH [CRC10] |
| Vapor Presure | 3.35E-05mmHg at 25°C |
| Appearance | white powder |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | Properties colorless transparent cubic crystal or white granular powder. Odorless and astringent. Melting Point: 93.5 ℃ relative density: 1.64 solubility: slightly soluble in water. Solubility: 15g/100ml water at 20 ℃, easily soluble in hot water. Soluble in dilute acid, glycerol, insoluble in alcohol. |
| Use | Used as water purification agent, mordant, paper sizing agent, and used in medicine, baking powder, tanning, food additives |
aluminumammoniumalum - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Ammonium sulfate Aluminum sulfate Aluminum hydroxide |
| Downstream Products | Sulfuric acid, aluminum ammonium salt (2:1:1) |
aluminumammoniumalum - Nature
Open Data Verified Data
colorless crystals or white crystalline particles or powders. Melting point 94.5 degrees C; Relative density of 165. 10 molecules of crystal water are lost at 120 ℃, become anhydrous at 250 ℃, and decompose above 280 ℃. 19 The product is soluble in 7ml water, 0.5 ml boiling water, aqueous solution is acidic. Soluble in glycerol, insoluble in ethanol. 0. 05mol/L aqueous solution pH 4.6.
Last Update：2024-01-02 23:10:35
aluminumammoniumalum - Preparation Method
Open Data Verified Data
industrial aluminum sulfate and ammonium sulfate were dissolved in water, respectively, and the two solutions were filtered and evaporated until crystals were precipitated. The resulting crystals were each dissolved with a small amount of water, and then the two were mixed. It was evaporated on a water bath to form a crystalline film and cooled to 15-20 °c with stirring. Suction filtration, fine crystals. Washing with water gave a crude ammonium aluminum sulfate. The crude ammonium aluminum sulfate was dissolved in water, recrystallized, and then dried at room temperature to obtain pure ammonium aluminum sulfate.
Last Update：2022-01-01 09:00:02
aluminumammoniumalum - Use
Open Data Verified Data
Analytical reagents. It can also be used as a flocculant for the purification of sewage. Paper sizing agent used in the paper industry; Leather industry as aluminum tanning agent; Glass industry as a colorant for yellow glass; Dye industry as an anti-dye agent for ice dye; Pharmaceutical industry for the manufacture of astringents and diuretics. Used as food additives in the food industry; Printing and dyeing industry as mordant; Pigment industry for the manufacture of high quality pigments and lakes, wax paper color paste of the color base. The starch industry is used as a preservative in starch pastes. High purity aluminum ammonium sulfate can be used in the manufacture of artificial precious stones, laser crystals, high purity alumina, electronic components, computer components and high pressure sodium lamps.
Last Update：2022-01-01 09:00:03
aluminumammoniumalum - Safety
Open Data Verified Data
aluminum ammonium sulfate is easy to corrode, so it should not be stored for a long time. The tidal bags should be stacked separately and disposed of at any time to prevent the loss of water. Products may not be stored in combination with toxic or other contaminants. During transport to prevent rain and sun exposure.
Last Update：2022-01-01 09:00:03
aluminumammoniumalum - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| identification test | with 2% aqueous sample solution, its aluminum (IT-2), ammonium (IT-3) and sulfate (IT-29) test were positive. |
| content analysis | method one (HG method) acetic acid sodium acetate buffer solution (pH value is 5~6) 200g of sodium acetate was dissolved in water, 30ml of glacial acetic acid was added, and diluted to 1000ml with water. Determine the ratio K of disodium EDTA standard solution (0.05mol/L) to lead nitrate standard solution (0.05mol/L). Take 25ml of disodium EDTA standard solution and place it in a 500ml Erlenmeyer flask, add 15m1 acetic acid-sodium acetate buffer solution, add water to 100ml, add 3-4 drops of Xylenol Orange indicator solution, and titrate to orange-yellow with lead nitrate standard solution. K = 25/V where V-volume of lead nitrate solution consumed, M1. Procedure for measurement about 5g of the ground and dried sample (0.0002g) was placed in a 150ml beaker, 80ml of water was added, heated and dissolved, then cooled and transferred into a 250ml volumetric flask, add 10 drops of (14) hydrochloric acid solution, set the volume and shake well (when turbid, filter and discard the initial filtrate). Take 25ml of the sample solution, put it in a 250ml Erlenmeyer flask, add 50ml of disodium EDTA standard solution and a small piece of Congo red test paper, and then use 1:1 ammonia water to adjust the test paper to be purple red (pH value is about 6), add 15ml of acetic acid-sodium acetate buffer solution, boil for 3min, add 3-4 drops of Xylenol Orange indicator after cooling, drop to orange-yellow color with 0.05mol/L lead nitrate standard solution. Aluminum ammonium sulfate [AlNH4 (SO4)2? The percentage of 12H2O] X1 is calculated according to the following formula: V0-V-difference between the volume of lead nitrate standard solution consumed by blank and sample solution, m1;c-concentration of lead nitrate standard solution, mol/L;m-sample mass, g. Method 2 (FCC,1996) accurately weigh about 1g of sample, dissolve in 50ml of water, 0.05mol/L of disodium EDTA solution (50.0ml) and pH 4.5 buffer solution (20ml) were added (the volume was fixed to ML from 77.1G of ammonium acetate and 57ml of glacial acetic acid) and boiled carefully for 5min. After cooling, 50ml of ethanol and 2ml of dithizone test solution (TS-95) were added. Titrate to bright rose pink with 0.05mol/L zinc sulfate. An empty test was performed. 0.05mol/L EDTA disodium solution per ml is equivalent to [AlNH4 (SO4)2? 12H2O]22.67mg. approximately 200g of the sample powder, which had been pre-dried at 0.8 ℃ for 4H, was accurately weighed, added to of water, and heated and dissolved in a water bath while shaking. After filtration, the filter residue was thoroughly washed with water, and the filtrate and washings were combined and adjusted to 200ml. Take 25ml of the solution, add 50ml of 0.01mol/L disodium EDTA solution, and heat to boiling. After cooling, 7ml of sodium acetate solution (TS-213), 85ml of absolute ethanol and 3 drops of dithizone solution (TS-94) were added and titrated with 0.01mol/L zinc acetate solution to the red end point. Each mL of 0.01mol/L of disodium EDTA solution is equivalent to anhydrous aluminum ammonium sulfate 2.371mg. |
| toxicity | ADI temporarily allows 0~7mg/kg/week, including all aluminum salt additives (FAO/WHO,2001). LD50 5~10 mg/kg (cat, oral). ADl tentatively allows weekly intake of 0~7 mg/kg, including all aluminum salt additives, calculated as aluminum;(FAO/WHO,2001). LD50 5~10 g/kg (cat, oral). GRAS(FDA,§ 182.1127,2000). |
| usage limit | GB 2760-1996: same as "15002, potassium alum". |
| Use | used as water purification coagulant, dyeing mordant, tanning aluminum tanning agent, paper sizing agent, yellow glass colorant, medicine astringent and food leavening agent, etc. as water purification agent and leavening agent, can replace potassium alum. China's provisions can be used for fried food, shrimp, soy products, baking powder, weiff biscuits, puffed food and aquatic products, according to the production needs of the appropriate amount of use, aluminum residues less than l00mg/kg. leavening agent; Water purifying agent; Color fixative (Pickle, etc. It should not be used for soybean paste in Japan. Since it does not contain water of crystallization, it is possible to absorb water in other raw materials in the mixed-type leavening agent to become water of crystallization, so as to maintain the quality of the leavening agent. The dissolution rate in water and the reaction with sodium bicarbonate are very slow, so the gas production effect can be maintained for a long time. for the purification of raw water and groundwater and industrial water treatment. buffer; Neutralizer; Leavening agent; Water purification agent; Color fixative of pickled vegetables and boiled and stewed food. Reference dosage: pickled eggplant 0.01% ~ 0.1% (Al), ammonium alum in aluminum and iron salt in eggplant blue pigment formation salt and does not fade. It is also used to protect the color of the cooked red seal fish. Sweet potato puree and chestnut sweets, Burdock plus soy sauce with sugar and other oil fried food, before cooking in the burdock or chestnut in 0.01% ammonium alum. The system utilizes the astringent effect of ammonium alum to improve the sense of chewing. Bread, cakes, leavening agent raw materials (acidic agent), the addition of wheat flour 0.15% ~ 0.5%. used as water purification agent, mordant, paper sizing agent, and used in medicine, baking powder, tanning, food additives, such as |
| production method | ammonium sulfate solution is added to concentrated aluminum sulfate solution, dissolved by heating, filtered, concentrated, after cooling and crystallization, it was obtained by separation. The indirect method uses sulfuric acid to decompose bauxite. Aluminum hydroxide method aluminum hydroxide and sulfuric acid reaction into ammonium sulfate, after concentration, cooling crystallization, centrifugal dehydration, drying and obtained. The direct synthesis method is obtained by the direct synthesis of industrial aluminum sulfate and ammonium sulfate after dissolving in water. The bauxite is added to the decomposition tank and sulfuric acid is added to decompose, and the aluminum sulfate solution with higher purity is obtained after being left to stand, settled and purified by absorbing the clear liquid. The density thereof was adjusted to 1.230 to 1.306 (19 ° C.). After the content of Al2(SO4)3 was 20%-26%, it was sent to the reaction tank, stirred under heating, and ammonium sulfate was added in a molar ratio of Al2(SO4)3: (NH4)2SO4=1: 0.42. The mixture was stirred at 100 °c until the ammonium sulfate was completely dissolved. Then, cooling, crystallization, filtration, washing of the crystals, and drying gave the final product. ammonium alum powder was placed on an aluminum plate and heated to 200 ° C. In an oven to remove water of crystallization. Direct synthesis industrial ammonium sulfate and aluminum sulfate are dissolved in water at 100 ° C., and the product is obtained by filtration, cooling, crystallization, separation and drying. After grinding, the bauxite of the synthesis process reacts with sulfuric acid and uses bone glue as sedimentation agent to obtain a clear aluminum sulfate solution with a relative density of 1.230~1.306(19 ℃/4 ℃) and containing 20% ~ 26% aluminum sulfate. At 100 ° C., ammonium sulfate was added in proportion, dissolved completely and then cooled to crystallize, separated and dried to obtain a finished product. Al2O3 +3H2SO4 → Al(SO4)3[(NH4)2SO4,HO2] → NH4Al(SO4)2 · 12H2O aluminum hydroxide method after the reaction of aluminum hydroxide with sulfuric acid, it is clarified by standing; ammonium sulfate was added to the clear solution, and the crystals were concentrated, cooled and precipitated, and finally separated and dried to obtain a finished product. 2Al(OH)3+3H2SO4→Al2(SO4)3[(NH4)2SO4,H2O] →NH4Al(SO4)2·12H2O |
| 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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Raw Materials for aluminumammoniumalum
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