Fermivin PRIMATHIOL
HIGH-IMPACT GREEN THIOL EXPRESSION
Purpose
Fermivin® PRIMATHIOL is a thiol-releasing yeast for white and rosé wines with a pronounced green thiol profile, suited to Sauvignon blanc and similar varieties. Performs reliably in moderate-YAN musts at 15–22 °C.
Thiol expression can be enhanced with Natuferm® BRIGHT.
Results & benefits
Oenological properties
| Fermentations kinetics | Standard |
| Nutrients requirements | High |
| Alcohol tolerance | 15 % vol. |
| Temperature range | 15-22 °C, 59-72 °F |
Science and Technology
Selected for its IRC7 (L/L) genotype with high β-lyase activity, enabling strong release of 4MMP and 3MH and conversion to
3MHA.
Comparison with a benchmark thiol yeast. Loire valley, France, 2024.
Odour detection thresholds are respectively 60, 0.8 and 4 ng/L.
Characteristics
Tasting notes
Wines fermented with Fermivin PRIMATHIOL show pronounced green-thiol profile, with notes of boxwood, fresh leaf, citrus zest, grapefruit and guava. The wines are fresh, direct and expressive, with a clean aromatic lift.
Metabolic characteristics
| SO2 production | < 10 mg/L |
| Volatile acid production | < 0.3 g/L |
| H2S production | Average |
Specification
Fermivin PRIMATHIOL In-Line Ready contains more than 10 billion active dry yeast cells per gram.
Download the application data sheet
Your distributorProduct information
Origin
Species: Saccharomyces cerevisiae var. cerevisiae.
Strain 667 was obtained from Gist-brocades’s wine yeast collection and validated by OENOBRANDS between 2023 and 2025.
Usage
Dosage and Packaging
Fermivin PRIMATHIOL In-Line Ready
Recommended dose: 30 g/hL.
Packaging: 500 g vacuum-sealed packets.
Packaging & Storage
Storage
Must be stored in its sealed, original packaging in a cool (5-15 °C / 41-59 °F) dry place.
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