If you notice crystal-like specs in your wine, these are most likely tartrates, and whilst they may make you curious, they are entirely harmless.
What Are Tartrates?
Tartrates, or potassium bitartrate crystals, are naturally occurring compounds in wine. They form from tartaric acid, one of the primary acids found in grapes. During the winemaking process, potassium and tartaric acid combine to create these crystals, which can appear as small, clear, or white particles.
How Do They Form?
Tartrates form when wine is subjected to cold temperatures. This can happen during the winemaking process or after the wine has been bottled and stored in cooler conditions. When the temperature drops, the solubility of tartaric acid decreases, causing it to combine with potassium and precipitate out of the liquid as solid crystals. These crystals then settle at the bottom of the bottle or adhere to the cork.
Are Tartrates Harmful?
Absolutely not! Tartrates are completely safe to consume and do not affect the taste or quality of the wine. In fact, their presence can be an indicator of the wine’s natural composition and minimal processing. Some winemakers even take pride in their appearance, as it signifies that the wine has not been overly manipulated or chemically altered.
What Should You Do If You Find Tartrates in Your Wine?
If you encounter tartrates in your wine, there’s no need to worry. You can simply pour the wine through a fine mesh strainer or cheesecloth to remove the crystals. Alternatively, you can leave them in the glass—they are completely safe to drink.
Embracing the Natural Beauty of Wine
Tartrates are a testament to the natural complexity of wine. They remind us that wine is a living product, influenced by the environment, climate, and the winemaker’s touch. So, the next time you find those little crystals in your glass, take a moment to appreciate the science and artistry that brought your wine to life.