buy Phosphonobutane Tricarboxylic Acid | Phosphonobutane (PBTC)

buy Phosphonobutane Tricarboxylic Acid | Phosphonobutane (PBTC)


  • CAS Number: 37971-36
  • Appearance: Liquid
  • Purity:50%
  • Made in: China 
  • Phone Num : +86-2150591759    
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  • Description
  • Analysis


2-Phosphonobutane-1,2,4, -tricarboxylic Acid (PBTC) with C7H11O9P is a Corrosion inhibitors and anti-scaling agents that used in various industrial applications. PBTC is a very cost-effective inhibitor compared to standard phosphonates such as HEDP / ATMP.

Properties of PBTC

Chemical formula C7H11O9P
Molecular Weight 270.13 g/mol
Physical Description


Dry Powder; Liquid


Density 1.27-1.30 g/cm3
Solubility Completely miscible with water
Chemical structure


Application of Phosphonobutane Tricarboxylic Acid 

  • Cooling water systems
  • industrial water treatment
  • Industrial detergents
  • Laundry and dishwashing products
  • Cleaning and furnishing care products
  • Disinfectants
  • Liquid dishwashing concentrates
  • Corrosion inhibitors and anti-scaling agents
  • Metal surface treatment as corrosion inhibitor for steel
  • Surface active agents
  • Retardant in concrete
  • Sequestering agent in textile auxiliaries
  • Photosensitive chemicals
  • Processing aids, not otherwise listed

Water treatment

One of the most important applications of this material is in water purification. Phosphonobutane Tricarboxylic Acid (PBTC) is used as an anti-corrosion and anti-scalant in industrial units. Water used in cooling systems and other industrial equipment contains hardening agents and impurities such as calcium carbonate and copper ions. These impurities cause many problems, including sedimentation in pipes and other water-dealing pathways, as well as corrosion in the system.

in water cooling systems used for this purpose, it encounters different temperatures and pressures along the way. These changes cause deposits of calcium and other substances in the system. Which is highly harmful and reduces the efficiency of equipment thus increasing the cost of repairs and operation. Generally, they are one of the best sediment controllers in phosphonate material equipment. They do this well by dispersing minerals and metals in themselves and controlling scale and preventing scale build-up in equipment.

Amino-trimethylene phosphonic acid (ATMP) and Etidronic acid (HEDP) also have this capability, but there are two barriers to using these substances:

Limitations in the solubility of their salts and their low resistance to oxidizing agents.

Anti-corrosion and anti-scalant

This material is a very strong anti-corrosion and anti-scalant  and is used in many industries. Due to the higher strength of this substance compared to other phosphonate compounds, this substance is more economical than other anti-scalants used in industry. It is used to control calcium carbonate. By preventing the reaction of metal ions, phosphonate prevents their unwanted reaction and the production of stable compounds. This material can be used in environments with very high hardness and temperature and high alkalinity. In addition to using this material in irrigation systems in agricultural industries and for the production of fertilizers and herbicides can also be used.

Cooling systems and industrial water treatment

in systems where water can play a key role as a cooling agent, calcium ions can cause deposits to build up inside the equipment, blocking the waterway. Slows down and causes system inefficiency. The best way to solve this problem is to use anti-scalants such as PBTC.

Industrial detergents

One of the most important uses of sulfonates is in the production of detergents. The use of these materials has the following advantages: reducing hardness and preventing the formation of sediments and dispersing contaminants and controlling their deposition.


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