PBTC Na4, PBTC Phosphonate 2019-09-11T03:34:38+00:00

Project Description

CAS No.: 40372-66-5

Molecular Formula: C7H7O9PNa4

Molecular Weight: 358

Structural Formula:



PBTC Na4 has a low content of phosphoric.  Its structure contains both phosphonic acid and carboxylic acid group, which enable its good scale and corrosion inhibition properties. PBTC Na4 scale inhibition property under high temperature is far better than that of organophosphines.

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


AppearanceWhite crystal powder
Active component (PBTCA, % )65.0 min
Active component (PBTCA•Na4, %)86.0min
Total phosphoric acid(PO43-%, )22.5min
PH (1% water solution)4.0-6.0
Fe, mg/L20max


PBTC Na4 is the widely used and high effective agent as composite scale and corrosion inhibitor. It is also an excellent stabilizer for zinc salt. PBTC Na4 is used as scale and corrosion inhibitor in circulating cool water system and oilfield refill water system, especially used together 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. PBTC Na4 is usually used together with zinc salt, copolymer, organophosphine, imidazole, and other water treatment chemicals.

Package and Storage:

25 kg/bag, customers’ requirement. Storage for one year in a shady room and dry place.

Package and Storage:

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

Related Products:

2-Phosphonobutane -1 2 4-Tricarboxylic Acid (PBTCA)
Tetra sodium salt of Amino Trimethylene Phosphonic Acid (ATMP•Na4)
Monosodium of 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid (HEDP•Na)