Winetitles Calendar - Upcoming Events

Webinar – Managing ‘reductive’ aromas in wines

Location: Online


Event Date: 7 November 2019 (11.30am)

Please check the organiser website for any changes due to COVID-19.

Contact Details

Association: The Australian Wine Research Institute
Email: [email protected]


Volatile sulfur compounds (VSCs) are known to cause ‘reductive’ aromas in wine, commonly described as ‘rotten egg’ (hydrogen sulfide), ‘putrefaction’ (methanethiol) and ‘rubber’ (ethanethiol). These compounds play important roles in determining wine aroma, consumer preference and the perception of wine quality. Therefore, the management of VSC concentrations in wines, whether from fermentation or ‘other’ origins, is an important consideration for winemakers. The main techniques used for VSC removal are oxidative handling and/or copper fining; however, the effectiveness of these treatments may be temporary, as the compounds can often reappear post-bottling when reductive conditions are re-established. This presentation will summarise the latest research on ‘reductive’ aroma formation in wines and discuss practical remediation strategies to manage these characters.

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