PRODUCT DETAILS
| Potassium Phosphate Dibasic Basic information |
| |
| Potassium Phosphate Dibasic Chemical Properties |
| Melting point |
340 °C |
| density |
2,44 g/cm3 |
| storage temp. |
Store at +5°C to +30°C. |
| solubility |
H2O: 1 M at 20 °C, clear, colorless |
| form |
Solid |
| color |
White |
| PH |
8.5-9.6 (25℃, 50mg/mL in H2O) |
| pka |
(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃) |
| Odor |
Odorless |
| PH Range |
8.8 |
| Water Solubility |
1600 g/L (20 ºC) |
| Sensitive |
Hygroscopic |
| λmax |
λ: 260 nm Amax: ≤0.20
λ: 280 nm Amax: ≤0.15 |
| Decomposition |
>465°C |
| Merck |
14,7658 |
| Stability: |
Stable. Hygroscopic. |
| InChIKey |
ZPWVASYFFYYZEW-UHFFFAOYSA-L |
| CAS DataBase Reference |
7758-11-4(CAS DataBase Reference) |
| EPA Substance Registry System |
Dipotassium phosphate (7758-11-4) |
| Provider |
Language |
| Dipotassium hydrogenphosphate |
English |
| SigmaAldrich |
English |
| ACROS |
English |
| ALFA |
English |
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| Potassium Phosphate Dibasic Usage And Synthesis |
| Description |
Dipotassium phosphate (K2HPO4) is a common source of phosphorus and potassium, which is often used as a fertilizer. It is also widely applied in the food industry, such as food additive and electrolyte replenisher for workout supplement. Another usage of dipotassium phosphate is as a medicine, who serves as a diuretic or laxative. Besides, it is employed in the production of imitation dairy creamers to prevent coagulation and used in certain powders to prepare beverages. In addition, it is commonly seen in chemical laboratories for producing buffer solutions and trypticase soy agar which is used to make agar plates for culturing bacteria. |
| Chemical Properties |
White crystalline powder |
| Physical properties |
White amorphous powder; deliquesces; decomposes on heating; converts to pyrophosphate when ignited; very soluble in water, 167 g/100mL at 20°C; very soluble in alcohol; aqueous solution slightly alkaline. |
| Uses |
Buffer solutions. |
| Uses |
Buffering agent in antifreeze solutions; nutrient in the culturing of antibiotics; ingredient of instant fertilizers; as sequestrant in the preparation of non-dairy powdered coffee creams. |
| Uses |
dipotassium phosphate is used as a buffering agent to control the degree of acidity in solutions. |
| Uses |
Dipotassium Phosphate is the dipotassium salt of phosphoric acid which functions as a stabilizing salt, buffer, and sequestrant. It is mildly alkaline with a ph of 9 and is soluble in water with a solubility of 170 g/100 ml of water at 25°c. It improves the colloidal solubility of proteins. It acts as a buffer against variation in ph. For example, it is used in coffee whiteners as a buffer against ph variation in hot coffee and to prevent feathering. It also functions as an emulsifier in specified cheeses and as a buffering agent for processed foods. It is also termed dipotassium monohydrogen orthophosphate, potassium phosphate dibasic, and dipotassium monophosphate. |
| Definition |
ChEBI: A potassium salt that is the dipotassium salt of phosphoric acid. |
| Preparation |
Dipotassium phosphate is prepared by partial neutralization of phosphoric acid with potassium hydroxide, followed by crystallization:
H3PO4+ 2KOH →K2HPO4+ 2H2O. |
| Application |
Dipotassium hydrogen phosphate can be used as corrosion inhibitor of antifreeze, nutrient of antibiotic culture medium, phosphorus and potassium regulator of fermentation industry, feed additive, medicine, fermentation, bacterial culture and preparation of potassium pyrophosphate, as feed phosphorus supplement additive. Potassium hydrogen phosphate can also be used as water treatment agent, microorganism, fungus culture agent and other purposes. It is often used as analytical reagent and buffer. It is also used in pharmaceutical industry. In food industry, it is used as raw material for preparing alkaline water for pasta products, fermentation agent, flavoring agent, bulking agent, mild alkaline agent for dairy products and yeast food. Dipotassium hydrogen phosphate can be used as buffer, chelating agent and analytical reagent. Buffers and pharmaceuticals. Dipotassium hydrogen phosphate can be used for boiler water treatment. In medicine and fermentation industry, dipotassium hydrogen phosphate can be used as phosphorus and potassium regulator and bacterial culture medium. It is the raw material for producing potassium pyrophosphate. It can be used as liquid fertilizer and corrosion inhibitor of ethylene glycol antifreeze. Feed grade is used as feed nutritional supplement. Potassium dihydrogen phosphate can be used as a product quality improver, which can improve the complex metal ions, pH value and ionic strength of food, so as to improve the bonding force and water holding capacity of food. China stipulates that dipotassium hydrogen phosphate can be used for fat planting powder, with a maximum dosage of 19.9g/kg. |
| General Description |
Potassium phosphate dibasic is a useful biological buffer having a pH in the range of 8.5-9.6. Potassium phosphate is present in various forms: monobasic (KH2PO4), dibasic (KH2PO4), and tribasic (K3PO4). Potassium phosphate buffers are widely employed in equilibrium dialysis, high performance liquid chromatography (HPLC) and affinity capillary electrophoresis studies. |
| References |
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| Potassium Phosphate Dibasic Preparation Products And Raw materials |
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