Modifier for Acidic Composition MK-7

Technical Requirements TU 2458-081-53501222-2011

Purpose of Use

Modifier for acidic composition MK-7, ferric reducer, is designed as an additive for the acidic composition of FLUXOCORE®210 and KSPEO brands which prevents precipitation in the presence of surplus of ferric iron during acid stimulation of production wells in carbonate and sandstone reservoirs. Acidic modifier MK-7 is added into the acidic compositions in case of surplus of ferric salts preventing their compatibility with oils.

Modifier for acidic composition МК-7 is available in two grades МК-7 grade A and МК-7 grade R, and depending of the grade is either dry mixture of organic heterocyclic compounds and aromatic compounds, or a liquid mixture of aromatic and specialized additives in organic solvents.

Application area of acidic compounds modified with MK-7

  • Enhancing oil recovery in production wells in carbonate and sandstone reservoirs in the presence of surplus of ferric iron.
  • Fresh production well development after drilling operations, well conversion into new production horizons, re-start of the wells after conservation.

More detailed information about the application of complex acidizing package of FLUXOCORE® 210 and KSPEO brands  modified with MK-7 can be seen on our site here.


Grade MK-7 grade A  MK-7 grade R 


Powdered crystal of white colour. Greyish or light brownish tints are permitted. Transparent fluid with the color varying from colorless to yellow
pH of 10% water solution, 
within the range
2-4 -
Mass fraction of main material, %,
not less than
90.0 -
Density at 20°С, g/cm3, within the range - 1.12 - 1.14
Freezing temperature, °С, not higher than - minus 30

Customer Benefits

Adding of modifier MK- 7 to acidic composition prevents precipitation at the interaction of  acidic composition with oil in the presence of surplus of ferric iron in the concentration up to 5 000 ppm.










Consumption Rates 

The chemical is added directly into the acidic composition. The consumption of the chemical is determined with laboratory tests in accordance with the specific application conditions of the customers. Maximal consumption of the chemical is not higher than 1.5% by the commodity form. To select optimal consumption rates of acidic modifier MK-7 it is recommended to contact the specialists of Service & Sales Department of Polyex company.


Dry modifier for acidic compositions MK-7 grade A is supplied in PP bags by 50 kg.

Liquid modifier for acidic compositions MK-7 grade R is supplied in steel drums by 227 l or in PP containers by 1 m3. If demanded the chemical may be supplied in automobile or railway cisterns.

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