Verus 2575: Blended Phosphates

Corrosion / Sequestration

The goal of Aulick Chemical Solutions is to enhance drinking water quality and preserve the integrity of the water distribution system with the use of inorganic phosphates. After extensive research, Aulick Chemical Solutions has developed phosphate blends to maximize their capability to perform the basic function of:

  • Corrosion Control
  • Cleaning
  • Sequestration

During the research and development of Verus 2575, Aulick Chemical Solutions kept in mind the need for the highest efficiency and effectiveness in order to utilize the lowest possible feed rate which equates to lowest possible chemical costs. This product was designed to help drinking water systems maintain compliance with the lead and copper rule and has also helped to lower disinfection by-products in some water systems.

There are some 18 phosphates certified for use in drinking water. Within the possiblities available, there are two major types for potable water treatment; orthophosphates and polyphosphates. There are four orthophosphates; 1 liquid and 3 white powders. Polyphosphates are more complicated by subtypes; namely pyrophosphates and polyphosphates (which may be condensed or linear). Each component functions differently with respect to pH, solubility, thermal stability, color control, corrosion control and reversion rate.

While phosphates function to clean and attack the corrosion problem, linear polyphosphate also exhibit the capability to sequester heavy and soft metal ions with a valance of +2, which includes iron, manganese, calcium and magnesium. Sequestration of iron and manganese cations prevent color formation by binding the +2 cations to prevent their oxidation to colored cations. The binding of calcium and magnesium cations (sequestration) acts to soften the water, also improving the water quality.

In order to inhibit the corrosion in metal pipes of the drinking water distribution network, the pipes must be clean. Therefore, old pipes must be cleaned to remove scale, tuberculation, and biofilm. Once clean, the phosphate will apply a protective coating to passivate the metal surface. Of course, new piping also requires treatment to inhibit the onset of corrosion. PVC pipes do not corrode; however, it does foster the growth of biofilm. The proper phosphate blend will prevent this biofilm formation that causes an increase in chlorine demand in the distribution system.

Verus 2575 Product Information

In developing the Verus 2575, care was taken to make the product versatile with respect to pH because of variation in pH of the water during processing and independent of the pH in different locations in the processing plant. Therefore, Verus Blended Phosphates are fully functional within the regulatory pH limits of 6.0 and 9.0.

Temperature stability is critical in phosphates. The most critical part of water distribution is the water heater. To maintain a clean and efficient water heater, the lines must be kept clean of calcium deposits. Many of the contact parts of a water heater reach temperatures above 250 °F, but not all phosphates are stable at these temperatures. Verus 2575 are designed to have temperature stability above 250 °F.

The issue of reversion of polyphosphates back to orthophosphates was taken into consideration by selection of phosphate components that exhibit the best chemical stability. In consideration of this aspect of product quality, one must know that chemical stability varies with water temperature, so selection should be made based upon the two opposing variables of sequestration capacity and molecular structure stability. Verus 2575 has maximized the molecular chain length of its phosphates without hindering the molecular structure stability.


Components 100 % USA Manufactured Components
Appearance Verus 2575- White Powder, Verus 2575L- Clear Liquid
Odor None
Density Verus 2575L- 11.4 lbs. per gallon
Specific Gravity Verus 2575L- 1.30 - 1.35
Product Concentration 33 -35 % by weight
Ortho/ Poly Ratio 25 - 75
pH Operating Range 6 - 9
Solvency in Water Infinite
Certification NSF, Standard 60, Approved
Temperature Stability Range - 25 °F to above 250 °F
Scale/ Corrosion Removal Range Varies with Feed rate, et. al.