Polyhydric Alcohol Phosphate Ester, PAPE


Esterification is the production that introduces multiple polyethylene glycol groups. This enhances its corrosion inhibition performance to the Ca2+ scale. Its effect on Ba2+ and Sr2+ is also good. Polyhydric alcohol phosphate ester has good compatibility with polycarboxylates and organophosphates.

Its ability to stabilize Zn2+ is characteristic. Thus, polyhydric alcohol phosphate ester can be built to dispersive antiscalant and inhibitor. Quaternary ammoniums like DDBAC can also be built with polyhydric alcohol phosphate ester and no complex generates as happens between Quaternary and polycarboxylates/organophosphates.

As the corrosion inhibitor and antiscalant, its effect is unique to the cooling water containing oil, which is normal in the refinery. PAPE is also used in oilfield (as an alternate of Nalco Visco 953), fertilizer plant, AC system, and copper heat exchanger. Polyhydric alcohol phosphate ester will degrade in 3 to 4 days after emission and incurs no pollution.

Molecular Formula:


Structure Formula:


AppearanceColorless or light yellow transparent liquid
Solid content, %50.0 Min.
Total phosphoric acid (PO43-), %30.0 Min.
Organophosphonic acid (PO43-), %15.0 Min.
pH (1% solution)2.0~3.0


When used alone, 5-10 mg/L is usually added for anti-scaling. The higher dosage is adopted for good corrosion inhibition. It can achieve even 150 mg/L in a closed circulating system. pH 7.0-8.5 is recommended.

Packing and storage:

200L plastic drum, IBC(1000L), customers’ requirements.

200L plastic drum 1000L IBC

Storage for ten months in a shady room and dry place.

Safety Protection:

Acidity, avoid contact with eye and skin. Once contacted, flush with water.


PAE, Polyol Phosphate Ester.