Tartaric Acid 100g

Tartaric Acid 100g — Wine Acidifier for Home Winemakers

Tartaric acid is the primary natural acid found in grapes, and the most important acid used in winemaking. Adding it to your wine adjusts the pH, sharpens acidity, improves flavour balance, and helps protect the finished wine against spoilage. This 100g pack by ESB is ideal for small batches and kit wine corrections.

Why Tartaric Acid?

Of the three common wine acids — tartaric, malic, and citric — tartaric is the most stable and least likely to be consumed by bacteria during fermentation. This makes it the preferred choice for winemakers who want precise, lasting acidification. It contributes a clean, crisp acidity without introducing off-flavours, and it integrates well into both red and white wines.

When to Use It

• Your must or finished wine tastes flat, flabby, or lacks structure
• pH testing shows your wine is too high (ideally, wine should sit between pH 3.2–3.6)
• You're working with low-acid grape varieties or fruit wines that need a lift
• You want to improve microbial stability and colour vibrancy in red wines

How to Use

Dissolve the required amount in a small quantity of wine or water before adding to your batch. As a general guide, 1g per litre of must will lower pH by approximately 0.1 units, though this varies depending on the wine's buffering capacity. Always test with a pH meter or acid test kit before and after adjusting, and add in small increments to avoid over-acidifying.

At 100g, this pack is well suited to adjustments on batches of up to 20–23 litres.

Key Features

• Natural acid derived from grapes — food grade and wine-safe
• Stable through fermentation — not broken down by lactic acid bacteria
• Improves taste, structure, colour stability, and microbial resistance
• Suitable for red, white, rosé, and fruit wines

Good to Know

Tartaric acid works best when added at the must stage (before fermentation), but can also be used post-fermentation for fine-tuning. If your wine is already too acidic, consider using potassium bicarbonate to reduce acidity instead.

Pairs Well With

pH Meter · Acid Test Kit · Potassium Metabisulphite · Wine Yeast