Ammonium dihydrogen phosphate is also known as Monoammonium phosphate. It is a white tetragonal crystals with chemical formula NH₄H₂PO₄. Its EINECS registry number is 231-764-5 and its CAS number is 7722-76-1. What's more, the substance is soluble in water which will melt at 190 °C. Ammonium dihydrogen phosphate can be mixed with all water-soluble fertilisers, except for calcium fertilisers and concentrated magnesium solutions. It should be kept in a tightly closed container, stored in a cool, dry, ventilated area and protected against physical damage. Ammonium dihydrogen phosphate is stable under ordinary conditions of use and storage.

Physical properties about Ammonium dihydrogen phosphate are: (1)ACD/LogP: -2.148; (2)ACD/LogD (pH 5.5): -5.41; (3)ACD/LogD (pH 7.4): -6.38; (4)ACD/BCF (pH 5.5): 1.00; (5)ACD/BCF (pH 7.4): 1.00; (6)#H bond acceptors: 4; (7)#H bond donors: 3; (8)Boiling Point: 158 °C at 760 mmHg; (9)Vapour Pressure: 1.41 mmHg at 25°C

Preparation of Ammonium dihydrogen phosphate: Ammonium dihydrogen phosphate can be prepared by venturi cyclic reaction method. Firstly, you should dilute 85% thermal phosphoric acid to 1.3～1.4 times and then add into reactor where it mixed and reacted with ammonia.

H₃PO₄ + NH₃ → NH₄H₂PO₄

There also are neutralization method and multiple decomposite method in industrial production, but neutralization method is more commonly used. It will need phosphoric acid and aqueous ammonia.

H₃PO₄ + NH₄OH → NH₄H₂PO4 + H₂O

Uses of Ammonium dihydrogen phosphate: Ammonium dihydrogen phosphate is often used in the blending of dry agricultural fertilizers. It is a widely used crystal in the field of optics due to its birefringence properties. The compound is also a component of the ABC powder in some dry chemical fire extinguishers. This substance is also supplied in an emerald green or aquamarine crystal growing box kit for kids.

When using Ammonium dihydrogen phosphate, you should very cautious about it. This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: [NH4+].OP(=O)(O)[O-]
(2)InChI: InChI=1S/H3N.H3O4P/c;1-5(2,3)4/h1H3;(H3,1,2,3,4)
(3)InChIKey: LFVGISIMTYGQHF-UHFFFAOYSA-N