A07 Flagship
Liquid Ale yeast from Imperial Yeast.
Lab
Imperial Yeast· Ale · Liquid · A07
Imperial Yeast· Ale · Liquid · A07Specs
Attenuation
72–77%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
16–22°C
61–72°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Flocculation
Med-low
How readily the yeast clumps together and drops clear once fermentation winds down.
Alcohol tolerance
≈12% ABV
The rough ABV ceiling where the yeast stresses out and stops fermenting.
Genetic traits
Phenolics
POF−
Ferments clean
Phenolically clean (POF-negative). No clove or spice, so malt, esters, and hops come through unmasked. The norm for American and British ales and most lagers.
Diastatic
STA-1−
Not diastatic
Does not carry the STA1 (diastaticus) gene. It attenuates normally, with no diastaticus over-attenuation or gushing risk.
Same strain, other labs
Potential substitutes for A07 Flagship
Usually used in
American IPAAmerican Pale AleAmerican StoutStoutTropicalCream AleAmerican Wheat BeerImperial IPABlonde AleAmerican Amber AleAmerican Brown AleCalifornia CommonBlack IPAIrish Red Ale+24 more
Common questions
- What is the A07 Flagship equivalent?
- Cali Ale and 1056 American Ale — the same strain from other labs, the Chico (American Ale) strain.
- What is A07 Flagship's attenuation?
- 72–77% apparent attenuation.
- What temperature should I ferment A07 Flagship at?
- 16–22°C is the recommended range.
- Does A07 Flagship produce phenolics (clove and spice)?
- No. A07 Flagship is POF-negative (phenolically clean), so it won't throw clove or spice.
- What beer styles is A07 Flagship good for?
- American IPA, American Pale Ale, American Stout, Stout, Tropical, Cream Ale, American Wheat Beer, Imperial IPA, Blonde Ale, American Amber Ale, American Brown Ale, California Common, Black IPA, Irish Red Ale, Wee Heavy, Hazy IPA, British Strong Ale, Red IPA, English Barleywine, White IPA, Red Ale, Robust Porter, Winter Seasonal Beer, American Barleywine, Imperial Stout, American Strong Ale, Wheatwine, Berliner Weisse, Gose, Pale Ale, Stout, Irish Dry, Brown Porter, English IPA, Scottish Ale, Stout, Sweet, Stout, Oatmeal, Old Ale, Stout, and Foreign Extra & Bière de Garde.
- What can I substitute for A07 Flagship?
- WLP001 California Ale Yeast, OYL-004 West Coast Ale I, and SafAle US-05.
Brew with A07 Flagship
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