Iron Control / Sequestering Agents
Precipitated iron plugs producing reservoirs. Sources include iron minerals, scale, and rusty tubular goods. Depending on the amount of ferric iron present, a gelatinous mass of precipitate forms and restricts or plugs pore throats. Iron control additives sequester or chelate the iron preventing iron precipitate from forming.
ICA 400
Organic acid salt solution
Organic acid salt solution that prevents the precipitation of iron by sequestering both ferric & ferrous iron into a soluble & stable colloidal suspension. The recommended concentration is 5-10 gal/1000 gallons (5-10 L/mᵌ) up to 200°F (93°C).
ICA 525
Polydental amino acid sodium salt
Polydental amino acid sodium salt that sequesters both ferric & ferrous iron to prevent gelatinous ferric hydroxide precipitation up to 350°F (177°C). Should only be used with hydrochloric (HCl) acid; not compatible with hydrofluoric (HF) acid. Normal concentration is 10-40 gal/1000 gallons (10-40 L/mᵌ).
ICA 720
Organic acid sodium salt
Organic acid sodium salt that functions as an iron reducing agent & oxygen scavenger for acidizing & fracturing fluids. Also functions as an anti-oxidant & weak chelating agent. Normal concentration is 3-10 pounds/1000 gallons (0.36-1.2 kg/mᵌ) up to 300°F (149°C).