Isomerized Kettle Extract (IKE)


Isomerized Kettle Extract (IKE) contains primarily isomerized alpha acids, beta acids, and hop oils. IKE is produced from generic or variety specific CO2 extract and can also be used for a late hop addition at the end of wort boiling.


  • Bitterness
  • Higher utilization than CO2 Hop Extract
  • Preserves hop oil flavors and aromas while still achieving full bitterness potential

Usage & Methods 

  • Warm extract to liquify and pour into kettle
  • Remove can lid and place inside brewhouse hop dosing vessel
  • Smallest can holds 0.5kg of extract, at 30-50% RIAA in the extract means 0.5-kg can holds 150 – 250 grams of RIAA.
  • IKE can be added early in the boil for bitterness, with expected utilization of iso-alpha acids of 40-60%. Long boil times will result in volatilization of most of the aromatic compounds
  • Late boil additions will preserve more of the aromatic oils that contribute to late kettle hop flavor and aroma while still obtaining iso-alpha acid utilization yields of 40-60%

Notes & Recommendations

  • It is best to add extract no earlier than 10 minutes after the beginning of the boil so that hop acids are not entrained in the coagulating wort proteins, reducing efficiency.
  • To maximize hop aroma it is best to add no later than 10 minutes before the end of boil to assure complete mixing and to avoid having an “oil slick” of extract floating on top of the wort.
  • Utilization of iso-alpha acids will vary depending on brewing equipment and original gravity and wort pH.
  • Brewers who are operating at high altitudes where the temperature of the boils is significantly below 212°F (100°C) may find better utilization by using PIKE (Potassium-Based Isomerized Kettle Extract).
  • If splitting into partial container(s), the extract should be warmed to above 120°F (50°C) to liquify and the container should be thoroughly stirred to homogenize.

Package & Storage

  • Packaging is in metal cans and can be filled based on customer requirements for grams of iso-alpha acids.
  • IKE stored in sealed unopened containers at temperatures <50°F(10°C) is best used within 2 years from the date of packaging Open containers should be covered, kept as cold as possible and used within two weeks.
  • All elements of the can, including inks, are food safe
CO2 Usage Calculation - Target Specific IBU
IBU Target:
BBL beer:
Hop Efficiency: %
kg of Alpha required: kg
Extract Alpha: (Check Package COA for Current Alpha) %
kg of Product: kg

Online calculators are designed to be informational and educational tools only. This online calculator is provided as a rough approximation and the results presented by this calculator are hypothetical and may not reflect total accuracy. Hopsteiner is not responsible for the consequences of any decisions or actions taken in reliance, nor responsible for any human or mechanical errors or omissions upon or as a result of the information provided by these tools.

BitternessAroma / FlavorFoamAnti - microbialLight StabilityHot SideCold Side
Kettle Product
Lupulin PelletsHop ConeHop ConeHop ConeHop Cone
CO2-ExtractHop ConeHop ConeHop Cone
HopFlowHop ConeHop ConeHop Cone
Isomerized Kettle Extract (IKE)Hop ConeHop Cone
(Potassium) Isomerized Kettle Extract (PIKE)Hop ConeHop Cone
Salvo™Hop ConeHop ConeHop Cone
Downstream Products
Alpha Extract 20%Hop ConeHop ConeHop Cone
Iso-Extract 30%Hop ConeHop ConeHop ConeHop ConeHop Cone
Rho Iso-Extract 30%Hop ConeHop ConeHop ConeHop ConeHop Cone
Tetra Iso-Extract 10%Hop ConeHop ConeHop ConeHop ConeHop Cone
Hexa Iso-Extract 10%Hop ConeHop ConeHop ConeHop ConeHop Cone
Beta Bio 45%Hop ConeHop ConeHop Cone
Hop OilsHop ConeHop ConeHop Cone