Molecular Formula | H7K2O7P |
Molar Mass | 228.22 |
Melting Point | 340°C(anhydrous substance),decomposes |
Water Solubility | SOLUBLE |
Solubility | H2O: 4M at20°C, clear, colorless |
Appearance | Crystallization |
Color | White |
Merck | 14,7658 |
PH | 9.1-9.4 (25℃, 50mg/mL in H2O) |
Storage Condition | room temp |
Stability | Stable. Incompatible with strong oxidizing agents. |
Sensitive | Hygroscopic |
MDL | MFCD00149926 |
Physical and Chemical Properties | Solubility H2O: 4 M at 20°C, clear, colorless water solubility SOLUBLE sensitive hydrogen Merck 14,7658 |
Use | Prepare buffer, buffer in antifreeze, nutrient in antibiotic medium. |
Safety Description | 24/25 - Avoid contact with skin and eyes. |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 28352400 |
Reference Show more | 1. Jiang Yu, Zhang Miao, Tang Jing, Jin Peng, Zheng Yonghua. Effects of Cold Shock Combined with Salicylic Acid Treatment on Chilling Injury and Energy and Proline Metabolism of Cucumber Fruits [J]. Journal of Nuclear Agriculture, 2021,35(01):128-137. 2. [IF = 7.514] Dandan Pu et al."Characterization of the oral breakdown, sensory properties, and volatile release during mastication of white bread." Food Chem. 2019 Nov;298:125003 |
colorless flakes, needle-like crystals or white particles. Deliquescence. Soluble in water, the solution is weak alkaline. Slightly soluble in ethanol. After burning, pyrophosphate was formed.
potassium carbonate was dissolved in water, phosphoric acid was added, and a small amount of potassium hydroxide solution was added to make phenolphthalein pale red. The solution was evaporated to a relative density of 1. 70, and seed crystals were added to crystallize it, which could be filtered by suction.
used as an analytical reagent, a nutrient agent in an antibiotic medium, and a buffer.
product characteristics | dipotassium hydrogen phosphate is also called dipotassium phosphate, the chemical formula is K2HPO4 · 3H2O, and the molecular weight is 28.22. The appearance is colorless flake or needle-like crystals or white particles. It is deliquescent, easily soluble in water (1g is about 3mL of water), the aqueous solution is weakly alkaline, the pH of 1% aqueous solution is about 9, and it is insoluble in ethanol. Density 2.33g/cm3. Potassium pyrophosphate K4P2O7 is generated after burning. Used as an analytical reagent, pharmaceutical raw material, as a buffer in the food industry, chelating agent, yeast food, emulsified salt, antioxidant synergist. China's "Hygienic Standard for the Use of Food Additives" (GB 2760-1996) stipulates that it can be used for vegetable fat powder with a maximum dosage of 19.9 g/kg. Let the phosphoric acid react with the potassium carbonate solution, and then add a small amount of KOH until the solution makes phenolphthalein rose red, and then evaporate and crystallize. |
identification method | the aqueous solution (1 20) of this product presents potassium salt reaction and phosphate reaction. 1. Potassium salt reaction, see potassium carbonate. 2. Phosphate reaction, see calcium dihydrogen phosphate. |
toxicological basis | 1. GRAS FDA-21 CFR 182.6285. 2. ADI MTDI 70 mg/kg(bw) (based on total phosphorus from various sources, FAO/WHO,1994). |
use | prepare buffer, buffer in antifreeze, nutrient in antibiotic medium. |