Ammonium phosphate dibasic

Description

Ammonium phosphates include mono- and diammonium orthophosphates and ammonium polyphosphates. As discussed below, these are made directly by reaction anhydrous ammonia with orthophosphoric acid or superphosphoric acid. Both are dry crystalline materials with good handling properties.

Chemical properties

white crystalline powder

Chemical properties

Ammonium phosphate is a white crystalline or powdery substance.

Physical properties

Colorless monoclinic crystal; saline taste; refractive index 1.52; density 1.619 g/cm³; melts at 155°C (decomposes); very soluble in water (57 g/100 g at 10°C and 106.7g/100g at 70°C, respectively); insoluble in alcohol, acetone, and liquid ammonia.

The Uses of Ammonium phosphate dibasic

Ammonium Phosphate Dibasic is a general purpose food additive that is readily soluble in water, with approximately 57 g dissolving in 100 g of water at 0°c. a 1% solution has a ph of 7.6–8.2. it is used as a dough strengthener, firming agent, leavening agent, and ph control agent. its uses include baked goods, alcoholic beverages, condiments, and puddings. in bakery products, up to 0.25 part per 100 parts by weight of flour is used.

The Uses of Ammonium phosphate dibasic

Fireproofing textiles, paper, wood, and vegetable fibers; impregnating lamp wicks; preventing afterglow in matches; flux for soldering tin, copper, brass, and zinc; purifying sugar; in yeast cultures; in dentifrices; in corrosion inhibitors; in fertilizers.

The Uses of Ammonium phosphate dibasic

It is commonly used in fertilizer as plant food as well as a yeast nutrient. Ammonium phosphate dibasic has been used to prepare multi-shell nanoparticles to increase transfection efficiency.

What are the applications of Application

Ammonium phosphate dibasic is a water soluble preparation of ammonium phosphate

Definition

ChEBI: An inorganic phosphate, being the diammonium salt of phosphoric acid.

Preparation

(NH₄)₂HPO₄ is made by reacting ammonia with phosphoric acid:
2NH₃ + H₃PO₄ → (NH₄)₂HPO₄.

Flammability and Explosibility

Not classified

Agricultural Uses

With excess ammonia, the technical grade of diammonium phosphate (DAP) contains 16 to 18% nitrogen and 20to 21 % phosphorus.
DAP is an important fertilizer as well as an intermediate in the production of complex fertilizers and bulk blends.

Contact allergens

A flame retardant caused contact dermatitis in surgical personnel. It was due to excessive residual concentrations in surgical garbs.

Safety Profile

Low to moderate toxicity. See also PHOSPHATES. When heated to decomposition it emits very toxic fumes of POx, NOx, and NH3.

Potential Exposure

Used in fireproofing of textiles; wood and paper; in soldering flux; as a fertilizer; a buffer; in baking powder and food additives.

Shipping

There are no DOT/UN listed requirements.

Purification Methods

Crystallise it from water (1mL/g) between 70o and 0o. Its solubility in H2O is 59% at room temperature and 200% at the boiling point. It slowly evolves NH3 and should be stored in a well-stoppered container. After one crystallisation, ACS grade salt had Fe, Mo, Na, Se and Ti at 1, 0.2, 1.4, 0.2 and 0.8ppm, respectively. [Gmelin’s, Ammonium (8th edn) 23 pp422-426 1936.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Contact with air causes this chemical to produce anhydrous ammonia fumes.

Waste Disposal

May be flushed to sewer with huge volumes of water.