Acetobacter aceti | White Labs WLP690 | Vinegar & Kombucha Culture
This yeast is 40% off because it’s within at least one month of its best by date. We never ship expired yeast, but it may arrive near or just past that date. In our own lab tests, we've seen up to 85% viability beyond the best by date—much better than most calculators predict. It's a smart way to save without compromising your brew.
White Labs WLP690 Acetobacter aceti for vinegar and kombucha cultures
White Labs WLP690 Acetobacter aceti is a liquid bacterial culture used for vinegar production and kombucha culture work. Acetobacter aceti oxidizes ethanol into acetic acid, the sharp acid associated with vinegar and acetic fermentations.
This is not a normal beer yeast strain and should not be evaluated by attenuation or flocculation like an ale or lager yeast. Use WLP690 when the goal is controlled acetic-acid production from an alcoholic base, or when building a kombucha culture where Acetobacter activity is desired.
Best uses
- Culture: Acetobacter aceti, a gram-negative rod bacterium.
- Primary role: oxidizes ethanol into acetic acid.
- Suggested uses: vinegar production and kombucha culture work.
- White Labs part number: WLP690.
- Product type: White Labs Vault culture.
Temperature guidance
The ideal growth temperature for WLP690 at 77-85°F / 25-30°C. The culture can oxidize ethanol more slowly around 68°F / 20°C, but warmer controlled conditions are better when active acetic fermentation is the goal.
How to think about WLP690
Most brewing yeast listings focus on sugar fermentation, attenuation, flocculation, and beer style profile. WLP690 is different. It works after ethanol is present and requires oxygen exposure to oxidize ethanol into acetic acid. That makes process control, sanitation, oxygen management, and the base liquid more important than beer-style fermentation specs.
Handling and storage
Keep White Labs liquid cultures refrigerated until use. For shipped orders during warm weather, add an ice pack and insulated envelope to help reduce heat exposure in transit. For related cultures and fermentation options, browse our White Labs yeast collection.
FAQ
Is WLP690 a beer yeast?
No. WLP690 is an Acetobacter aceti bacterial culture, not an ale or lager yeast. It is used for acetic-acid production rather than normal wort fermentation.
What does WLP690 do?
It oxidizes ethanol into acetic acid. That is the core process behind vinegar production and part of the microbial activity found in kombucha cultures.
What temperature should I use?
White Labs lists 77-85°F / 25-30°C as the ideal growth range. Activity can continue more slowly around 68°F / 20°C.