INITIA® 611 is a differentiated phosphinocarboxylic acid (PCA) dispersant for use in a wide range of applications.  INITIA® 611 is differentiated from traditional PCA polymers in that it is optimized with a higher level of phosphino functional groups.  These phosphino functional groups are the basis for improved efficacy and thermal stability versus more basic polyacrylic acids.   INITIA® 611 is an exceptional inhibitor for calcium carbonate, calcium sulfate and barium sulfate scales.  Additionally, INITIA® 611 is a highly effective dispersant and deposit control agent in boiler applications up to 500psi.  INITIA® 611 meets the criteria of 21 CFR 173.310 for boiler applications where steam may contact food and is Kosher Certified.


typical properties

appearance clear, yellow  liquid
total solid content 49.0 -51.0 %
pH (as is) 2.5 – 3.5
Brookfield viscosity at 25 °C 100 – 600 cPs
density at 20 °C 1.17 +/- 0.05 g/ml
solubility in water complete
residual monomer <0.1
specific gravity 1.22-1.28

INITIA® 611 delivers…

  • high effective control of calcium carbonate scale
  • exceptional control of calcium and barium sulfate scales
  • effective dispersion of inorganic such as iron oxides, hydroxyapatite, and sludge
  • outstanding thermal and hydrolytic stability
  • stability to oxidizing biocides


suggested applications

  • cooling towers
  • boilers (up to 500 psi)
  • industrial reverse osmosis
  • mining
  • oilfield and natural gas


thermal stability

INITIA® 611 is an effective tool for use in boiler applications for iron transport, hydroxyapatite control, and general solids dispersion.  INITIA® 611 was evaluated using Thermogravimetric analysis (TGA) to demonstrate the thermal stability of the polymer. Figure 1 shows that INITIA® 611 substantially retains its integrity up to 240°C which equates to about 500 psi in boiler applications.   Additionally, INITIA® 611 was compared to a traditional PCA using Differential Scanning Calorimetry (DSC.)  DSC is a thermal analysis tool that measures heat changes (exotherms) that occur to the polymer during a controlled increase in temperature.   The DSC analysis depicted in Figure 2 shows that INITIA® 611 and the traditional PCA are virtually identical in their exothermic responses to increasing temperature with significant events occurring between ~210°C and 240°C for both polymers.


 figure 1 – thermogravimetric analysis (TGA)


 figure 2 – differential scanning calorimetry (DSC)


calcium carbonate and calcium sulfate inhibition

INITIA® 611 was evaluated versus traditional PCA using a modified NACE calcium carbonate test method  (Figure 3) and the standard NACE method for calcium sulfate (Figure 4) inhibition.  In both evaluations INITIA® 611 demonstrated comparative or better to the competitive PCA.


 figure 3 – calcium carbonate inhibition



figure 4 – calcium sulfate inhibition


safety use and handling

Consult the Safety Data Sheet (SDS) for further information regarding the safe handling and use of INITIA® 611. This product should be stored in a cool/dry place and must be protected from freezing. Avoid storage at high temperatures (>90°F), direct sunlight, and exposure to surface, airborne or other common environmental contaminants such as debris, bacteria, yeast, and mold.