Citric vs Tartaric vs Malic Acid: Which to Use in Wine Making

Acidity is what makes a wine taste fresh and lively rather than flat and flabby. It also helps protect wine against spoilage and gives yeast a healthy environment to ferment in. Grape juice usually has the right balance naturally, but country and fruit wines often don't, which is where citric, tartaric and malic acid come in.

Why Acidity Matters

• Flavour: balances sweetness and gives a crisp, refreshing finish
• Protection: a properly acidic wine is far less prone to spoilage
• Fermentation: yeast works best in a suitably acidic must

As a guide, most wines sit around pH 3–4: roughly 3.2 for whites and 3.6 for reds. Cider is best between pH 3.2 and 3.6; above about pH 4 it's more prone to flavour problems and infection.

The Three Wine Acids

Tartaric acid – the grape acid

The main acid in grapes, and the most stable of the three. It's the best choice for grape wines and for giving country wines a more "winey" character. In cold conditions it can form small harmless crystals (tartrates, sometimes called wine diamonds) in the bottle.

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Malic acid – the apple acid

The main acid in apples, giving a crisp, green-apple sharpness. Ideal for apple wines and cider, and for adding brightness to other fruit wines.

Malic Acid 50g · BrewCo Malic Acid 50g

Citric acid – the citrus acid

Found in lemons and oranges, citric acid gives a fresh, zesty lift. It's the acid most traditional country wine recipes call for. Used heavily it can taste distinctly citrusy, so many winemakers use it alongside tartaric and malic rather than on its own.

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Which Acid Should I Use?

• Grape wines and wine kits: tartaric, if any adjustment is needed
• Apple wine and cider: malic
• Country wines: follow your recipe; a blend of all three often gives the most balanced result
• Flower wines (elderflower, dandelion): these have almost no natural acid, so acid additions are essential

Too Much Acid?

Very sharp fruit, such as rhubarb, or an over-generous addition can leave a wine too acidic. BrewCo Acid Reducer (also in 500g) is fine precipitated chalk (calcium carbonate). It neutralises acid, starting at 7g per gallon to reduce acidity by around 1.5 parts per thousand. It fizzes as it works, so leave head space in the container, and if you add it to finished wine, leave it somewhere cold for a week so any sediment can drop out. Precipitated chalk does the same job.

How to Get It Right

• Follow your recipe's acid additions to start with.
• Taste as you go: a wine that tastes flat and dull usually needs more acid; one that makes you wince needs less.
• Add small amounts, stir well and taste again. It's easier to add more than to take it away.

Frequently Asked Questions

What is the difference between citric, tartaric and malic acid?

Tartaric is the main grape acid and the most stable; malic is the apple acid, giving crisp sharpness; citric is the citrus acid, giving a fresh lift. They each give a slightly different character.

Which acid is best for wine making?

Tartaric for grape wines, malic for apple wines and cider, and a blend of all three for most country wines.

Can I use lemon juice instead of citric acid?

Yes, traditional recipes often do, but lemon juice varies in strength and adds its own flavour. Citric acid powder is easier to dose accurately.

How do I reduce acidity in wine?

Use an acid reducer such as precipitated chalk (calcium carbonate), adding a little at a time and leaving head space, as it fizzes.

What are the crystals in my wine bottle?

Usually harmless tartrate crystals from tartaric acid, which form when wine gets cold.