Description
Erlenmeyer flask 250 ml in borosilicate glass – for rehydrating dry yeast
250 ml Erlenmeyer flask with a narrow neck, made by VWR in borosilicate glass. 250 ml is a good size for rehydrating dry yeast, and the flask can also be used for samples and simple lab work. The neck is 34 mm in diameter.
Features
- High chemical resistance
- High temperature resistance
- High resistance to temperature changes
How to rehydrate dry yeast
- Sanitise the Erlenmeyer flask in boiling water.
- Boil water and let it cool to approx. 30 °C. Use about 10 times as much water as yeast, e.g. approx. 100 ml of water for 10 g of yeast.
- Sprinkle the yeast over the water and cover the flask with aluminium foil.
- Leave it until the yeast has dissolved, then swirl the flask gently. Do not shake hard.
- Pitch the yeast into the fermenter.
Technical data
- Volume: 250 ml
- Neck diameter: 34 mm
- Material: borosilicate glass
- Manufacturer: VWR
Frequently asked questions about the 250 ml Erlenmeyer flask
Do I need to rehydrate dry yeast?
It is somewhat debated, but dry yeast benefits from rehydration. A 250 ml flask is handy for this.
Why borosilicate glass?
Borosilicate glass handles high temperatures and rapid temperature changes well, and it is resistant to chemicals.
Is 250 ml enough for a yeast starter?
No, 250 ml is best for rehydration and small samples. For yeast starters you need a larger flask, such as 2000 ml, because the flask needs headspace above the starter.
Related
Betaling
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