Zinc Sulphate Heptahydrate 25KG

Zinc Sulphate Heptahydrate 25KG

Zinc Sulphate Heptahydrate granular powder is a simple source of Zinc for where the nutrient is lacking.

Zinc is an essential growth factor for many strains of yeast. A healthy yeast requires many nutrients to sustain its growth. Zinc acts as a metal ion co-factor, catalysing several enzymic reactions that would otherwise not occur or at a prolonged rate. An example is alcohol dehydrogenase, which yeast uses to manufacture alcohol and C02 under fermentation conditions.

Deficiencies can cause the following symptoms:

• Long lag phase
• High pH
• Sticking fermentations
• Poor finings
  

Densky et al. (1966) showed that wort contains from 0.05 – 0.10 ppm (mg/litre) Zn and noted growth stimulation if these worts were supplemented with Zn to a level of 0.5 ppm.
Frey et al (1967) found from 0.04 to 0.07 ppm of Zinc in worts and obtained both fermentation and growth stimulation at 0.5 ppm. The study also showed that Zinc is not toxic to yeast at the 5 ppm level. (Yeast Technology, Reed & Peppler)
It can help reduce sulphur characteristics of beers by reacting with Hydrogen sulphide produced during the fermentation to precipitate insoluble Zinc sulphide.

Rates of Use:
It can be added to the copper during the boil or mixed with a small volume of wort and added to the fermenter.
Rates can vary depending on the yeast strain used and the composition in the grist. Zinc will typically be added within a range of 0.045 to 0.11 grams per hectolitre of Zinc sulphate heptahydrate. (Equivalent to 0.1 to 0.25 mg/litre as Zn 2+)

Click the Specification Tab to see Data Sheets.