[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt
L(+)tartaric acid dipotassium
CAS: 921-53-9
Molecular Formula: C4H4K2O6
[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt - Names and Identifiers
| Name | L(+)tartaric acid dipotassium |
| Synonyms | potassium tartrate POTASSIUM TARTRATE dipotassium tartrate POTASSIUM L-BITARTRATE POTASSIUM (+)-TARTRATE POTASSIUM ACID TARTRATE POTASSIUM HYDROGEN TARTARATE L(+)tartaric acid dipotassium POTASSIUM HYDROGEN L-TARTRATE POTASSIUM L-TARTRATE MONOBASIC L-Tartaric acid dipotassium salt [r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt |
| CAS | 921-53-9 |
| EINECS | 213-067-8 |
| InChI | InChI=1/C4H6O6.2K/c5-1(3(7)8)2(6)4(9)10;;/h1-2,5-6H,(H,7,8)(H,9,10);;/q;2*+1/p-2/t1-,2-;;/m1../s1 |
[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt - Physico-chemical Properties
| Molecular Formula | C4H4K2O6 |
| Molar Mass | 226.27 |
| Density | 1.954g/mLat 25°C(lit.) |
| Boling Point | 200-220℃ |
| Flash Point | 200-220°C |
| Solubility | Almost insoluble in alcohol, |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | White powder |
| Storage Condition | Room Temprature |
| Stability | Stable. |
| Physical and Chemical Properties | Density 1.98 decomposition temperature 200-220°C |
| Use | For food processing, electroplating, pharmaceutical, etc |
[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| RTECS | WW8223000 |
| HS Code | 29181300 |
[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt - Introduction
Colorless crystal or white crystalline powder, loses crystal water at 155 ℃, decomposes at 200~220 ℃, and the aqueous solution is slightly acidic to litmus
Last Update：2022-10-16 17:30:11
[r-(r*,r*)]-2,3-dihydroxybutanedioic acid dipotassium salt - Reference Information
| Decomposition | 200-220 ºC |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | potassium tartrate chemical formula K2C4H4O6. Molecular weight 226.27. Dihydrate is a racemate, colorless monoclinic crystals, relative density of 1.984, soluble in water, 100 deg C to lose the crystallization of water into anhydrous. Its hemihydrate relative density 1.98, refractive index 1.526 (beta),155 deg C to lose water of crystallization, 200~220 deg C decomposition. Very soluble in water, slightly soluble in ethanol. |
| Use | for the preparation of a kind of micro-porous activated carbon, including the following steps:(1) dry or dry the enteromorpha, through 40~50 mesh sieve, prepared enteromorpha powder; The enteromorpha powder is heated to 550~700 ℃, heat preservation, obtain enteromorpha char;(2) according to the mass ratio of potassium tartrate to enteromorpha charcoal 1~5:1, potassium tartrate is added to the enteromorpha charcoal, mixed evenly, deionized water is added, stirred evenly, and dried to obtain the mixture;(3) under the protection of nitrogen, the mixture was heated to 500~900 ℃, activated for 0.5h ~ 2.5h, stopped heating, cooled to room temperature; Washed with dilute hydrochloric acid, then it is washed with deionized water until the pH value is 6.5~7.0, and dried or dried naturally. The activated carbon of the present invention has a micropore specific surface area of 93.36%, a micropore ratio of 67.3%, a pore diameter of 2.241nm, strong adsorption and excellent performance. used in food processing, electroplating, pharmaceutical |
| preparation | preparation of potassium tartrate: 1, according to the characteristics of potassium hydrogen tartrate soluble in hot water, soft water or distilled water twice as much as tartar or acid-reducing precipitate is first added to the reactor, and after heating to boiling, stirring is started and tartar or acid-reducing precipitate is added. After all the material was dissolved, solid potassium carbonate was added. Because the reaction is more intense, and a large amount of carbon dioxide gas is generated in the reaction process, in order to make the operation stable, in the addition of potassium carbonate, the batch should be added and the stirring should be strengthened. The amount of potassium carbonate added was determined when the pH of the test system was 7 using litmus paper. 2. The neutral reaction material is filtered while hot, the filtrate is heated to boiling, and activated carbon is added for decolorization. The activated carbon and other impurities were then removed by filtration. The amount of activated carbon added to the material is colorless and transparent, generally 5% to 10% of the material. 3, after the decolorization of the material heating evaporation, when the concentration of potassium tartrate to meet the requirements of the material into the enamel plate, natural cooling crystallization at room temperature. 4, the crystal is dried, that is, the content of more than 99% to obtain potassium tartrate. |
| trait | potassium tartrate is colorless crystal or white crystalline powder, which loses crystal water at 155 ℃ and decomposes at 200-220 ℃, almost insoluble in alcohol, the aqueous solution of litmus is slightly acidic, pH 7-8, the relative density of 1.180. |
| Application | potassium tartrate is widely used in food, pharmaceutical, chemical, light industry and other industries, mainly used in the manufacture of tartrate salts, such as potassium antimony tartrate, potassium sodium tartrate, etc. Potassium tartrate is used in the food industry as a beer foaming agent, food acid, flavor and so on. The sour taste of potassium tartrate is 1.3 times that of citric acid, which is especially suitable for the sour agent of grape juice. This product is identified as an excellent food additive by FAO/WHO Expert Committee. Potassium tartrate also plays a very important role in tanning, photography, glass, enamel, telecommunications equipment and other industries. L( )-tartaric acid is a natural organic acid and is used as a leavening agent in the food industry (making cakes and breads, etc.). Condiment, food processing. It is also used as a resolving agent in the pharmaceutical industry to prepare chiral drugs and their intermediates. |
Last Update：2024-04-09 19:05:15
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