Potassium Dihydrogen Phosphate - Introduction

1. Acidity: Potassium dihydrogen phosphate will partially dissociate in water to produce hydroxide ions (OH⁻), so the solution is acidic. (It should be noted that in fact, potassium dihydrogen phosphate in water will dissociate to produce hydrogen ions (H⁺), making the solution acidic. There is a misunderstanding in the original Chinese description here.)
2. Laboratory reagent: Potassium dihydrogen phosphate is often used as a buffer, pH regulator, and phosphate catalyst in laboratories.

1. Neutralization reaction: React phosphoric acid (H₃PO₄) with potassium hydroxide (KOH) under appropriate conditions to obtain potassium dihydrogen phosphate.
2. React potassium hydroxide with diammonium hydrogen phosphate: Reacting potassium hydroxide with diammonium hydrogen phosphate can yield potassium dihydrogen phosphate, and ammonia gas is generated simultaneously.
3. Avoid contact with strong oxidants: Potassium dihydrogen phosphate can react with strong oxidants (such as potassium permanganate) to produce combustible materials.
4. Wear personal protective equipment: When handling potassium dihydrogen phosphate, protective goggles, gloves, and appropriate protective clothing should be worn.
5. Avoid inhalation or skin contact: Potassium dihydrogen phosphate is irritating, and one should avoid inhaling its dust or allowing it to come into contact with the skin.
6. Storage precautions: Potassium dihydrogen phosphate should be stored in a dry and well-ventilated place, and keep it away from flammable substances.