Precipitated Chalk (Calcium Carbonate) 100g

£2.50

3+ in stock

Calcium Carbonate (Precipitated Chalk) 100g. Raises pH and reduces acidity in beer, wine, and cider

Precipitated Chalk (Calcium Carbonate) 100g

Calcium Carbonate (Precipitated Chalk) raises the pH of brewing liquor and musts, reducing acidity. In brewing, its use is generally limited to dark beers with high proportions of roasted grain such as stouts, where raising mash pH counteracts the acidity contributed by dark malts. In winemaking and cider making, it is used as a deacidifier to reduce excessive acidity from malic and tartaric acids.

Please note: Adding Calcium Carbonate will produce CO2, which may cause foaming, and will throw a sediment. In winemaking, it is best added to the must (unfermented juice) before primary fermentation. For wine, 1g per gallon (4.5 litres) reduces acidity by approximately 1.5g ppt. For mash pH adjustment in dark beers, dose to pH test rather than a fixed rate. For reducing pH (increasing acidity), see Lactic Acid Powder or Gypsum (Calcium Sulphate).