Ammonium dihydrogen phosphate

Introduction;
Ammonium dihydrogen phosphate (MAP), also known as monoammonium phosphate, is a white crystalline solid with the chemical formula H6NO4P. It has a relative molecular mass of 115.03, a melting point of 180℃, a refractive index of 1.525, and a relative density of 1.803. It is readily soluble in water, slightly soluble in ethanol, and insoluble in organic solvents such as acetone.

Ammonium dihydrogen phosphate is relatively stable at room temperature, but it decomposes above its melting point, producing a mixture of ammonium metaphosphate and phosphoric acid. At room temperature (20℃), its solubility in water is 37.4 g, and a 0.1 mol/L solution of ammonium dihydrogen phosphate has a pH of approximately 4.0. Ammonium dihydrogen phosphate crystals belong to the tetragonal crystal system, exhibiting a combination of tetragonal prismatic and tetragonal bipyramidal forms. Its lattice constants are a=b=7.502 Å, c=7.546 Å, and α=β=γ=90°.

Uses;
Primarily used in the formulation of compound fertilizers, and can also be applied directly to farmland. Used as an analytical reagent and buffer.

Uses;
In the food industry, it is used as a leavening agent, dough conditioner, yeast feed, brewing fermentation aid, and buffer. Also used as an animal feed additive.

Uses;
Battery industry

Uses;
Can be used as a flame retardant for wood, paper, and textiles; a dispersant in fiber processing and dyeing industries; a glaze for enamel; a compounding agent for fire-retardant coatings; an extinguishing agent for matchsticks and candle wicks; a dry powder fire extinguisher. Also used in printing plate making and pharmaceutical manufacturing.

Uses;
Preparation of buffers and culture media; Production of phosphates. Analytical standards are used for nitrogen determination using the Kjeldahl method. After first use, it is recommended to store under argon or nitrogen purging.