Ammonium polyphosphate

Colorful consumables are added to the varnish for coating and giving the paints fire-retardant properties. The additive itself, ammonium polyphosphate, is a free-flowing white substance (inorganic salt of polyphosphoric acid). There is no smell.

The structure is small crystals. Differs in high stability, as well as non-volatility. Environmentally friendly and non-toxic. A 10% aqueous solution has an acidity level ranging from 5 to 7 pH.

The shelf life is 12 months - the countdown is made from the date of manufacture.
The density of the substance corresponds to 1.9 g / cm3.

Water solubility depends on the crystalline type of the substance: phase 1 (APP1) - indicates a short linear chain length, which provides a higher ability to dissolve in water, as well as a lower melting point (from 150C) compared to phase 2.

Add. transport information
When transporting, importing ammonium polyphosphate, the documents use the TN VED code, which corresponds to the value 2835390000

Application of the substance
Ammonium polyphosphate is used in many applications. It is included in the composition of agricultural fertilizers, in the automotive industry and directly in the chemical industry, for the manufacture of the final product. industry. Also, polyphosphate is widely used in fire protection.

In case of fire of surfaces and parts that contain ammonium polyphosphate. It breaks down into polyphosphoric acid and non-combustible gases, which in turn slows down the combustion process. Due to this property, PFA is added to the composition of fire-retardant paints and varnishes, fire-resistant materials made of plastic and polyurethane.

A fire retardant is included in the formulation in the production of epoxy resins. The protective insulating layer of electrical cables also contains this substance.

How to get ammonium phosphate?
There are several methods that result in this substance:
1. as a result of neutralization of polyphosphoric acids with ammonia;
2.in the reaction of phosphoric acid and urea grade B
3.interaction of ammonium and carbamide hydrogen phosphates