Water Treatment Chemicals, Phosphonates, Polymers, Biocides


Organophosphoric Antiscale and Corrosion Inhibitors, Chelant

2-Phosphonobutane -1 2 4-Tricarboxylic Acid Sodium salt

CAS No.:40372-66-5

Molecular Formula: C7H7O9P•Na4

Molecular weight: 358

Structural Formula:



2-Phosphonobutane -1 2 4-Tricarboxylic Acid Sodium salt PBTCA•Na4 has low content of phosphoric, its structure contains both phosphonic acid and carboxylic acid group, which enable its good scale and corrosion inhibition properties. Its scale inhibition property under high temperature is far better than that of organophosph-ines. PBTCA•Na4 can improve the solubility of zinc salt, has good chlorine oxidation tolerance and good composite synergy. PBTCA•Na4 solid state is easy deliquescence.


items index
Appearance White 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/L 20max


PBTCA•Na4 is the widely used and high effective agent as composite scale and corrosion inhibitor, 2-Phosphonobutane -1 2 4-Tricarboxylic Acid Sodium salt PBTCA•Na4 is also the excellent stabilizer for zinc salt. PBTCA•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. PBTCA•Na4 can be used in situations of high temperature, high hardness, high alkaline and high concentration index, PBTCA•Na4 is used as chelating agent and metal detergent in lavation fields.

PBTCA•Na4 is usually used together with zinc salt, copolymer, organophosphine, imidazole and other Water Treatment Chemicals.

Package and Storage:

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


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)

Shandong IRO Water Treatment Co., Ltd.

Office Address: 2802, 1st Building, No.19 Zhangzhou 2nd Rd, Qingdao, China
Factory Address: Qicun Town, Shizhong, Zaozhuang, Shandong, China
Tel: +86-532-85027466 Fax: +86 532 85028486
Email: info@irowater.com

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