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Diammonium phosphate

physical science Maturity 11-13 Next article →

Diammonium phosphate is a very useful salt. People often call it DAP for short.

DAP (Diammonium Phosphate) Granules (2)
DAP (Diammonium Phosphate) Granules (2)

It is made when ammonia reacts with phosphoric acid. This process creates a substance that dissolves in water. DAP is important because it helps many things work. It can help plants grow or even help fight fires.

There are many ways that DAP works. Farmers use it as a fertilizer for crops. It changes the pH of the soil. pH is a way to measure how acidic the ground is. At first, the soil becomes less acidic. Over a long time, the soil becomes more acidic. This happens because of a thing called nitrification.

DAP can also be used as a fire retardant. A fire retardant is something that slows down a fire. It works by lowering the heat of the fire. It also makes more char. Char is a dark residue left after something burns. This can help create a firebreak to stop wildfires. This happens because there is less fuel for the fire to eat.

There are many specific facts about DAP. Its typical NPK ratio is 18-46-0. This means it has 18% nitrogen and 46% phosphorus. It has 0% potassium. In a liquid, the pH is usually 7.5 to 8.

DAP (Diammonium Phosphate) Granules (2)
DAP (Diammonium Phosphate) Granules (2)

At 100 degrees Celsius, it has a certain pressure. If it reaches 155 degrees Celsius, it emits different gases. These include ammonia and phosphorus oxides.

Many different industries use this salt. It is a nutrient for yeast in winemaking. It is used to help purify sugar. It is even used in matches to prevent afterglow. Some brands of cigarettes use it as an additive. It can also be used as a flux for soldering. This helps join metals like tin, copper, zinc, and brass. In nature, it is found as a rare mineral called phosphammite.

This mineral is related to guano deposits.

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🖼️ Images & Media (2)
File:DAP (Di-Ammonium Phosphate) in a 1 kg commercial package (2).jpg
DAP (Di-Ammonium Phosphate) in a 1 kg...
File:DAP (Diammonium Phosphate) Granules (2).jpg
DAP (Diammonium Phosphate) Granules (2).jpg
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