SafSpirit™ R-4 Questions & Answers

What is SafSpirit™ R-4 for?

SafSpirit™ R-4 is the ideal yeast for fermenting various grades of cane molasses for spirit production. It is a consistent performer even under several stress factors.

What are the key advantages of SafSpirit™ R-4 for distillers?

• SafSpirit™ R-4 can perform on different qualities and compositions of cane molasses
• SafSpirit™ R-4 can perform in high stress conditions (pH, organic acids, different sugar content, high gravity)
• Even under high-stress conditions, SafSpirit™ R-4 produces a neutral flavour profile, avoiding off-flavours.

Why did Fermentis decide to add this product to the SafSpirit™ range?

SafSpirit™ R-4 was developed to extend our product portfolio for the fermentation of sugar molasses and to bring to market a more robust strain, given that the quality and toxicity of sugar molasses can be very different from one country to the next.

How was it developed?

Firstly, a screening was done to compare the performances of different yeast strains on various quality sugar cane molasses. Different sugar cane molasses were picked from all over the world.

Following the initial screening, successively different Design of Experiments (DOE) were performed, first to select the best candidates and then to characterize in depth their performances in stressful conditions at different pH, gravity, etc.

Is SafSpirit™ R-4 in any way comparable to SafSpirit™ C-70?

Compared to SafSpirit™ C-70 (the ideal yeast for molasses spirits including rum with flavor compounds produced from the yeast), SafSpirit™ R-4 is more efficient in producing potable alcohol even at high stressful conditions.