Isovaleric Acid Flavour Standard


The isovaleric acid flavour standard helps train professional tasters to recognise the potency of the isovaleric acid character. Isovaleric acid is a common flavouring compound found in many foods and beverages. Some strong hoppy craft beers have a noticeable amount of Isovaleric acid within them adding a slight cheese flavour note to the beer. It is often described as having a cheesy, sweaty, or old hops-like flavour.

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Product Description

Sensory Terms
– Stale cheese
– Sweaty
– Old hops
– Putrid

Cause of Flavour
Occurs primarily in hop based alcoholic beverages such as beers. The use of old or degraded hops will impart Isovaleric flavours to the final product

High hopping rates will also introduce Isovaleric – some strong hoppy craft beers have a noticeable amount of Isovaleric acid within them adding a slight cheese flavour note to the beer.

Other Information
Flavour Wheel Number: 0613

Flavour Level: Variable – 0.5 – 2 mg / l

Recommended flavour standard / sensory reference standard of: American Society of Brewing Chemists (ASBC) and the European Brewing Chemists (EBC).

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