DIPOTASSIUM phosphate
Potassium hydrogen phosphate anhydrous
CAS: 7758-11-4;16778-57-7
Molecular Formula: HK2O4P
DIPOTASSIUM phosphate - Names and Identifiers
| Name | Potassium hydrogen phosphate anhydrous |
| Synonyms | DKP DIPOTASSIUM phosphate Potassium phosphate dibasic Potassium phosphate, dibasic Dipotassium hydrogen phosphate Dipotassium Phosphate Anhydrous Potassium hydrogen phosphate anhydrous POTASSIUM HYDROGEN PHOSPHATE ANHYDROUS |
| CAS | 7758-11-4 16778-57-7 |
| EINECS | 231-834-5 |
| InChI | InChI=1/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2 |
DIPOTASSIUM phosphate - Physico-chemical Properties
| Molecular Formula | HK2O4P |
| Molar Mass | 174.175901 |
| Melting Point | 340℃ |
| Water Solubility | 1600 g/L (20℃) |
| Appearance | White crystal |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00011383 |
| Physical and Chemical Properties | Properties white crystalline or amorphous powder. The solubility is easily soluble in water, and the aqueous solution is slightly alkaline. Slightly soluble in alcohol. melting point 340°C water-soluble 1600g/L (20°C) |
| Use | Used in medicine, fermentation, bacterial culture and preparation of potassium pyrophosphate |
DIPOTASSIUM phosphate - Risk and Safety
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
DIPOTASSIUM phosphate - Upstream Downstream Industry
DIPOTASSIUM phosphate - Reference
| Reference Show more | 1. Zhang Xifeng, Liu Xiaoyan, Ma Yinshan, etc. Saccharification extraction and inhibition of advanced glycation end products of polyphenols from Lycium barbarum L. [J]. Fine Chemicals, 2018, 035(003):395-401. 2. Lin, Li Chunmei. Effects of Persimmon tannin on intestinal microbes in simulated fermentation environment in vitro [J]. Science and Technology of food industry,, 36(022):160-163,167. 3. Jiang Yu, Zhang Miao, Tang Jing, Jin Peng, Zheng Yong Hua. Effects of cold shock combined with salicylic acid treatment on chilling injury and energy and proline metabolism of cucumber fruit [J]. Journal of Nuclear Agriculture, 2021,35(01):128-137. 4. [IF = 4.155] Siqi Zhang et al."Step-wise immobilization of multi-enzymes by zerconium-based coordination polymer in situ self-assembly and specific tolerance." J Inorg Biochem. 2020 Jul;208:111093 |
DIPOTASSIUM phosphate - Nature
Open Data Verified Data
colorless translucent crystal or white crystalline powder, odorless. Soluble in water (6.3g/lOOmL), insoluble in ethanol. Hygroscopic, 1% aqueous solution pH value of about 9.0.
Last Update：2024-01-02 23:10:35
DIPOTASSIUM phosphate - Preparation Method
Open Data Verified Data
neutralization method; The solid caustic potash is prepared into 30% aqueous solution, after clarification and filtration to remove impurities, it is added to the corrosion-resistant reaction tank after metering, and the appropriate amount of 50% phosphoric acid solution is slowly added under stirring, the neutralization reaction was carried out at 90~100 ℃, and the end point of the reaction was controlled to pH 8. 5~9.0 (Phenolphthalein was used as an indicator until the color was red). Concentration was carried out by heating to 120-124 ° C., and insoluble matters were removed by filtration after the concentration of the solution reached the desired range. The clarified filtrate was cooled to below 20 ° C. To precipitate crystals, and then centrifuged and slightly air-dried to prepare dipotassium hydrogen phosphate finished product. The mother liquor is filtered and returned to the process for use.
Last Update：2022-01-01 09:07:55
DIPOTASSIUM phosphate - Standard
Authoritative Data Verified Data
This product is calculated according to the dry product, and the content of K2HP04f is less than 99.0%.
Last Update：2024-01-02 23:10:35
DIPOTASSIUM phosphate - Trait
Authoritative Data Verified Data
- This product is colorless or white crystalline powder or granules or lumps; Odorless; With hygroscopicity. ^
- This product is easily soluble in water and almost insoluble in ethanol.
Last Update：2022-01-01 11:28:54
DIPOTASSIUM phosphate - Introduction
Sensitive to humidity. After burning, it will become pyrophosphate. Easily soluble in water, the solution is alkaline, slightly soluble in ethanol.
Last Update：2022-10-16 17:28:39
DIPOTASSIUM phosphate - Use
Open Data Verified Data
used in the food industry as flavoring agents, bulking agents, buffering agents, integrants, moisture retention agents and mild alkalinity agents for dairy products. The effect of complexing metal ions, pH, increasing ionic strength and the like of the food can be increased. Dipotassium hydrogen phosphate has a strong ability to block metal ions, and can be used as a binder and a water-retaining dispersant, and can be combined with other condensed phosphates, thereby improving the adhesion and water holding capacity of foods. China provides all kinds of food GMP, as a source of potassium (potassium, g/10og): infant formula powder is not more than lo00; The larger infant formula food 400~1500; infants and young children supplemented with cereal flour 200~1000.
Last Update：2022-01-01 09:07:55
DIPOTASSIUM phosphate - Differential diagnosis
Authoritative Data Verified Data
The product of the aqueous solution of potassium salt and phosphate identification reaction (General 0301).
Last Update：2022-01-01 11:28:54
DIPOTASSIUM phosphate - Safety
Open Data Verified Data
- ADI 0 to 70mg/kg (total amount of phosphate in terms of phosphorus, FAO/WHO,2001).
- the solid product is packed in a plastic woven bag lined with a polyethylene plastic bag with a net weight of 50kg per bag/liquid product in a polyethylene plastic drum with a net weight of 40kg per barrel. See potassium dihydrogen phosphate for storage.
Last Update：2022-01-01 09:07:56
DIPOTASSIUM phosphate - Exam
Authoritative Data Verified Data
alkalinity
take l.Og of this product, add water to dissolve 20ml, and then determine it according to law (General rule 0631). The pH value should be 8.5~9.6.
clarity and color of solution
take this product l.Og, add water to dissolve 10ml, check according to law (General rule 0901 and general rule 0902), the solution should be clear and colorless.
chloride
take 0801g of this product and check it according to law (General rule 0.004%). Compared with the control solution made of 6.0ml of standard sodium chloride solution, it should not be more concentrated ().
sulfate
take 2.0g of this product, add water to dissolve to about 40ml, adjust the pH value to slightly acidic (pH <6) with hydrochloric acid, check according to law (General rule 0802), and mix with standard potassium sulfate solution 3. 4 ml of the control solution should not be more concentrated (0.017%).
carbonate
take 2.0g of this product, add 10ml of water, boil, cool, add 2ml of hydrochloric acid, no bubbles should be generated.
condensed phosphate
take 2.0g of this product, put it in a 100ml measuring flask, add water to dissolve and dilute to the scale, shake well. Add 5.0mL of dilute acetic acid 1.0mL and acetic acid-sodium acetate solution (17ml of 1 mol/L sodium hydroxide solution, 40ml of dilute acetic acid, 100ml of water). 0ML, add water to make 15ml, add barium chloride test solution 2ml, shake, at 25°C ± 2°C for 15 minutes, not to produce turbidity.
insoluble in water
take 10.0g of this product, heat 100ml of water to dissolve, filter with constant weight No. 4 vertical melting glass crucible, and wash the precipitate with 200ml of hot water for 10 times, after drying at 105 ° C. For 2 hours, the residue should not exceed 2mg(0.02%).
reducing substances
Take 5.0g of this product, add new boiling cold water to dissolve and dilute to 50.0, take 5.0, add dilute sulfuric acid 5M l and potassium permanganate titration solution (0.02mol/L)0.25, heated in a water bath for 5 minutes, the solution of the purple red color should not disappear.
loss on drying
take this product, dry to constant weight in 1301, weight loss shall not exceed 2.0% (General rule 0831).
Iron Salt
take this product l. After adding 20ml of water to dissolve, add 1 ml of hydrochloric acid solution (l-2) and 2ml of 10% sulfosalicylic acid solution, shake well, add 5ml of ammonia test solution, shake well, if color develops, it should not be deeper (0807) compared with 0.001% of standard iron solution (general rule) of control solution prepared by the same method.
sodium
take this product l.OOg, put in a 100ml measuring flask, dissolve with water and dilute to the scale, shake well, as stock solution for test, take 5ml of stock solution for test, put in 100ml measuring flask, add water to dilute to the scale and shake, as a test solution; Take another 100g of sodium chloride which has been dried at 105~0.5084°C for 3 hours, put it in a 100ml measuring flask, dissolve it with water and dilute to the scale, shake, as a reference solution I; Precision take the reference solution I2.5ml into a 100ml measuring flask, dilute with water to the scale, shake, as a reference solution n( 50ug/ ml, in terms of Na +); 5ml of the stock solution of the test article and 11 ml of the control solution were accurately measured and placed in a 100ml measuring flask, diluted with water to the scale, and shaken well to serve as the control solution. Take the test solution and the reference solution, take the flame as the atomizer, according to the atomic absorption spectrophotometry (the second method of the general principles 0406), at the wavelength of 589nm, the reading of the reference solution is a, the reading of the test solution is 6, and the 6 value should be less than (a 6). That is, the sodium content should not exceed 0.1%.
Heavy metals
take 2.Og of this product, add 15ml of water to dissolve, adjust the pH value of the solution to about 4 with hydrochloric acid, add 2ml of acetate buffer (pH 3.5) and appropriate amount of water to make 25ml, inspection according to law (General Principles 0821, Law 1), containing heavy metals shall not exceed 10 parts per million.
arsenic salt
take l.Og of this product, add 23ml of water to dissolve, add 5ml of hydrochloric acid, check according to law (General rule 0822 first law), should comply with the provisions (0.0002%).
bacterial endotoxin (for injection)
take this product, check according to law (General rule 1143), each 1 mg of Dipotassium hydrogen phosphate in the amount of endotoxin should be less than 1.1EU.
sterile (for non-sterile preparation of manzhi)
take this product, according to the law inspection (General 1101), should comply with the provisions.
Last Update：2022-01-01 11:28:55
DIPOTASSIUM phosphate - Content determination
Authoritative Data Verified Data
take about 3.8g of this product, weigh it accurately, add 50ml of fresh boiling cold water to dissolve it, and then use potentiometric titration (General rule 0701), titration with sulfuric acid titration solution (0.5mol/L). Per 1 ml of sulfuric acid titration solution (0.5mol/U equivalent to 174.2mg K2HP04.
Last Update：2022-01-01 11:28:55
DIPOTASSIUM phosphate - Category
Authoritative Data Verified Data
pharmaceutical excipients, pH regulators and buffers.
Last Update：2022-01-01 11:28:56
DIPOTASSIUM phosphate - Storage
Authoritative Data Verified Data
sealed and stored in a dry place.
Last Update：2022-01-01 11:28:56
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Raw Materials for DIPOTASSIUM phosphate