PBTC·Na4, PBTC Phosphonate

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PBTC·Na4 has a low content of phosphoric. Instead, its structure contains phosphonic acid and carboxylic acid groups, enabling its good scale and corrosion inhibition properties. This PBTC tetra-sodium salt scale inhibition property under high temperatures is far better than that of organophosphines.

PBTC·Na4 can improve the solubility of zinc salt and has good chlorine oxidation tolerance and good composite synergy. In addition, the solid-state is easy deliquescence.


AppearanceWhite crystal powder
Active component (PBTCA), %65.0 Min.
Active component (PBTCA Na4), %86.0 Min.
Total phosphoric acid(PO43-), %22.5 Min.
pH (1% water solution)4.0~6.0
Fe, mg/L20 Max.


PBTC·Na4 is a widely used and highly effective composite scale and corrosion inhibitor agent. It is also an excellent stabilizer for zinc salt. The PBTC phosphonate is used as a scale and corrosion inhibitor in the circulating cool water system and oilfield refill water system, especially used with zinc salt and copolymer.

PBTC·Na4 can be used in situations of high temperature, high hardness, high alkaline, and high concentration index. It is used as a chelating agent and metal detergent in lavation fields. This PBTC tetrasodium salt is usually used together with zinc salt, copolymer, organophosphine, imidazole, and other water treatment chemicals.

Packing and storage:

25 kg/bag, customers’ requirements.

weaved plastic bag

Storage for one year in a shady room and dry place.

Safety and Protection:

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