What is Potassium Dihydrogen Phosphate (E340i)? Uses, Safe, Side Effects

What is Potassium Dihydrogen Phosphate (E340i)? Uses, Safe, Side Effects


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Potassium dihydrogen phosphate (E340i), also known as disodium acid pyrophosphate and sodium acid pyrophosphate, is used in food to standardize pH levels in sodium-containing products and to regulate acidity in some bakery mixes. This food additive is also used to stabilize rice bran oil, which can become rancid when exposed to air for an extended period of time.

What is potassium dihydrogen phosphate?

Potassium dihydrogen phosphate is a chemical compound with the formula KHPO4. This acid salt is important in biological systems for buffering and maintaining pH. It is also an important commercial chemical, used to manufacture fertilizers and other chemicals.

Potassium dihydrogen phosphate is the salt of potassium and dihydrogen phosphate, two monobasic acids. The salt can be prepared by neutralization of these acids with sodium bicarbonate.

Potassium dihydrogen phosphate is a soluble salt that turns acidic in water, forming the dihydrogen phosphate ion (HPO4^-).

What is potassium dihydrogen phosphate used for?

Potassium dihydrogen phosphate is a chemical compound that is commonly used in the food industry as a leavening agent. It can be used to make bread rise, but it also has other uses. In fact, it is often found in cleaning products because of its ability to dissolve grease and oils.

Potassium dihydrogen phosphate is also used in toothpaste and mouthwash to prevent cavities. Some types of toothpaste contain 1% potassium dihydrogen phosphate, while others have even higher concentrations.

One common use of potassium dihydrogen phosphate is as a fertilizer for plants and crops. It helps plants grow by providing them with essential nutrients like nitrogen and phosphorus. Farmers often apply this chemical to their fields before planting so that it can be absorbed into the soil where it will provide these nutrients throughout the growing season.

Potassium phosphate is a mineral salt that is found in many foods. It can be used as an additive in food products to add flavor and texture, or it can be used as a preservative. It is also used in the preparation of baking powder and baking soda.

The following are some foods that contain potassium phosphate:

  • Baking powder
  • Baking soda
  • Banana
  • Milk
  • Orange juice
  • Beans and lentils
  • Cereals (especially ones with added sugar)

How is potassium dihydrogen phosphate made?

Potassium dihydrogen phosphate, KDP, is a compound that is used as a source of potassium and phosphorus in fertilizers and other applications. It is produced by reacting ammonia with phosphoric acid.

Potassium dihydrogen phosphate is manufactured using the following steps:

1.    Ammonia gas (NH3) is passed through a scrubber to remove dust particles from the air.

2.    The ammonia gas is warmed to about 150°C (300°F). At this temperature, NH3 condenses into liquid NH4OH (ammonium hydroxide).

3.    The liquid NH4OH flows through a distillation column where it is heated to about 200°C (400°F). This causes some of the water in the liquid to evaporate into a vapor phase and leave behind a concentrated solution of ammonium hydroxide in liquid form.

4.    The concentrated solution of ammonium hydroxide flows into a reactor where it reacts with phosphoric acid at high temperatures (about 300°C or 570°F) and pressures (up to 800 pounds per square inch [psi]). The reaction produces a mixture of compounds that includes potassium dihydrogen phosphate (KDP).


Other names Potassium dihydrogen phosphate  7778-77-0  Potassium phosphate monobasic  MONOPOTASSIUM PHOSPHATE  Monobasic potassium phosphate
Chemical formula KH2PO4
Molecular weight 136.09
CAS number 7778-77-0
Appearance White crystalline granular or powder
Solubility Freely soluble in water, insoluble in ethanol
PH 4.2 to 4.8 (1% solution)


potassium dihydrogen phosphate structure

What is the application of potassium dihydrogen phosphate?

Potassium dihydrogen phosphate is used as an electrolyte in electroplating and electroforming processes, as well as in metal cleaning, refining and pickling baths.

Potassium dihydrogen phosphate is also used in agriculture as a fertilizer and soil conditioner, but it is not commonly available as such to the public. It can be purchased through specialty chemical distributors or chemical supply companies that provide technical assistance to agricultural professionals who require these types of products for their chemical applications.


Potassium dihydrogen phosphate is used as a buffering agent because it can bind to metal ions in food products to help maintain their pH level. The pH of the product can be lowered if too much acid is added or raised if too much base was added to the food product during processing. This will help maintain the integrity of the ingredients in your food or beverage product so that it does not spoil or lose its quality before you are able to consume it.


Potassium dihydrogen phosphate is used as a water softening agent and as an acidity regulator. It also has other uses, including in food, cosmetics and pharmaceuticals.


Potassium dihydrogen phosphate (KH2PO4) is an important source of potassium for plants. It is used primarily as a fertilizer and soil amendment, but also finds use as a fungicide, seed disinfectant and industrial chemical. The mineral form of potassium phosphate is mined as karst limestone and has been used for centuries to increase soil fertility.


The potassium dihydrogen phosphate is used in pharmaceuticals. It is used to prepare buffered solutions and as a buffer itself. The phosphate ion is an important component of many compounds, such as phosphoric acid and phosphates, which have been widely used for food preservation and health care.

Other uses

Potassium dihydrogen phosphate is also used as a preservative for animal feed ingredients, including fish meal and bone meal.

Is potassium dihydrogen phosphate safe?

Potassium dihydrogen phosphate is a white powdery substance. It can be used in the production of detergents, fertilizers and other products. It is also used as a food additive in the form of potassium hydrogen phosphate.

Potassium dihydrogen phosphate has many beneficial properties for human health. It helps fight against infection and disease by boosting immune system function. It also improves energy levels and mental clarity which helps reduce stress and anxiety levels in people who take it regularly.

Potassium dihydrogen phosphate also helps treat kidney stones by washing out excess calcium from the body through urination. This can help prevent the formation of new kidney stones from taking place in your kidneys or bladder areas.

Potassium hydrogen phosphate is not safe for use during pregnancy because it can cause birth defects when taken by pregnant women who are trying to conceive or those who have recently conceived babies in their wombs. Its use should be discontinued immediately if you find out that you are pregnant so that you do not risk harming your unborn child or yourself through its use while pregnant.

Potassium dihydrogen phosphate (KH 2 PO 4 ) is a common fertilizer that’s used to add potassium, phosphorous and oxygen to soil. The chemical formula for KH 2 PO 4 is K2HPO4, which means one molecule of the compound contains two atoms of potassium, one atom of hydrogen and two atoms of phosphorous.

Potassium is an essential nutrient for plants. It helps them grow strong roots and sturdy stems, as well as produce fruit and flowers. Phosphorous plays a major role in photosynthesis, which helps plants convert sunlight into energy needed for growth.

Because it contains both nutrients, KH 2 PO 4 can be used as a fertilizer for all types of plants grown in soil, including vegetables, fruits and grains. It can also be used as an additive to animal feed.

Potassium dihydrogen phosphate injection is used to treat low blood levels of potassium. Potassium is a mineral in your body that helps to control heart rate and rhythm, keep the acid-base balance in the blood, and transmit a nerve signal across a cell membrane.

Potassium dihydrogen phosphate injection may also be used for purposes not listed in the medication guide.

You should not use potassium dihydrogen phosphate injection if you have a stomach ulcer or kidney disease. You may need to avoid using it if you have gout or severe kidney damage.

To make sure potassium dihydrogen phosphate injection is safe for you, consult with your doctor if you have conditions as below:

  • kidney disease;
  • a history of kidney stones;
  • gout.

The human body needs potassium for a variety of functions. It is an important electrolyte that helps regulate blood pressure and fluid balance in the body. Potassium also helps maintain normal muscle and nerve function, keeps heart rhythm steady, and supports the immune system. The recommended daily intake for adults is 4,700 milligrams (mg). Most people get enough potassium from their diets, but those who have certain medical conditions or take certain medications may need to take a supplement.

Potassium plays an important role in maintaining healthy blood pressure levels. It does this by helping regulate calcium flow into and out of cells, which affects how much sodium enters cells as well. When sodium levels go up, potassium levels go down; when sodium levels go down, potassium levels rise again. This process maintains normal sodium-potassium concentrations inside each cell in your body so they can function properly.

What are the side effects of potassium dihydrogen phosphate?

Potassium dihydrogen phosphate is a prescription drug used to treat hypokalemia (low potassium levels) in people with chronic kidney disease. Potassium dihydrogen phosphate is available as a generic drug in the United States.

Potassium dihydrogen phosphate may cause many side effects. Common side effects include:

  • Nausea and vomiting
  • Diarrhea
  • Dizziness
  • Headache
  • Infection at the injection site
  • Low blood pressure (hypotension)

Where to buy potassium dihydrogen phosphate?

You can buy potassium dihydrogen phosphate from a chemical supplier, or you can find it in many of the same places that you would find other chemicals. For example, if you’re looking for potassium dihydrogen phosphate for use in making fertilizer, then you can find it at hardware stores and garden supply centers.

Potassium dihydrogen phosphate is also used in the production of paper and pulp. If you are an industrial chemical manufacturer, then chances are good that you already have access to this product through your purchasing department.

If you need to buy potassium dihydrogen phosphate in large quantities or if you need to buy it quickly, then you should consider purchasing from Grade Chemical, Which is one reliable potassium dihydrogen phosphate supplier in China. they can deliver to you by courier in short days.

Frequently Asked Questions

Is potassium dihydrogen phosphate toxic?

Potassium dihydrogen phosphate is not toxic to humans. It is used in many foods as a preservative, and in some cases as a coloring agent. In large doses it can be mildly irritating to the skin, but that is its only known side effect.

What is the formula of potassium dihydrogen phosphate?

The formula of potassium dihydrogen phosphate is K2HPO4.

Potassium dihydrogen phosphate is an acid. Potassium dihydrogen phosphate (KH2PO4) is a salt of the conjugate acid, which is phosphoric acid. The conjugate base of phosphoric acid is hydroxide. This means that KH2PO4 has a hydrogen bonded to each of its four oxygens and a negative charge on each of its three phosphates. This gives it a total net charge of -1, making it an acid.

The percent composition of potassium dihydrogen phosphate is 1.49% nitrogen, 0.01% phosphorus, 0.53% oxygen, and 98.08% hydrogen.

Potassium dihydrogen phosphate is not hazardous. It is a common food ingredient and can be found in a wide variety of foods, including baked goods, dairy products, and meat products.

The difference between potassium dihydrogen phosphate and potassium dihydrogen orthophosphate is that one is a salt, while the other is an acid.

Potassium dihydrogen phosphate, or KDP, is a salt made up of potassium ions and dihydrogen phosphate ions. It’s produced by reacting potassium hydroxide with phosphoric acid.

Potassium dihydrogen orthophosphate, or K2HPO4, is an inorganic compound that contains both phosphoric acid and hydrogen phosphate functional groups. It’s produced by reacting sodium hydrogen phosphate with potassium hydroxide.

The pH of potassium dihydrogen phosphate is 6.86


To summarize, potassium dihydrogen phosphate E340i is popular in processed foods because it’s a key additive player in the food industry used to replace salt and eliminate the need for artificial colors and flavors. However, E340i isn’t natural or organic. It’s comprised of phosphorous and potassium, but if you plan on consuming E340i, it’s best to make sure this additive is clearly marked on your list of ingredients.

If you have any questions about potassium dihydrogen phosphate E340i? please contact us in the below comments.

Sophie Feng

Sophie Feng

Sophie Feng is the author of gradechemical.com, she is the co-founder of the grade chemical network. She has been in grade chemical company since 2017, with a working knowledge of food chemical .

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