Other than marketing what is the chemical difference between good expensive vodka and cheapest 80 proof you can buy?

There are a few key differences in the production process that can impact the quality and taste of vodka, even if they are both 80 proof:

1. Starting Materials:

* Expensive Vodka: Often uses higher quality grains like wheat, rye, or potatoes. These grains have a higher starch content, which results in a smoother and cleaner taste.

* Cheap Vodka: Can use less desirable grains like corn or even sugar, which can lead to a harsher, more "grain-y" taste.

2. Distillation Process:

* Expensive Vodka: Typically distilled multiple times (often 4-5 times) to remove impurities and achieve a smoother taste.

* Cheap Vodka: May be distilled only once or twice, leaving behind more impurities that can contribute to a less refined taste.

3. Filtration:

* Expensive Vodka: May undergo additional filtration steps using charcoal, sand, or other materials to remove any remaining impurities.

* Cheap Vodka: May use less sophisticated filtration methods, resulting in a less clean taste.

4. Water:

* Expensive Vodka: Often uses high-quality spring water or filtered water to enhance the final taste.

* Cheap Vodka: May use less filtered water, which can impact the taste and overall quality.

5. Aging and Blending:

* Expensive Vodka: Some higher-end vodkas may be aged in oak barrels or blended with other spirits to add complexity and character.

* Cheap Vodka: Typically not aged or blended.

Chemical Differences:

While the chemical composition of both types of vodka will be largely similar (ethanol and water), the differences in the production processes can lead to subtle variations in the presence of trace compounds (esters, aldehydes, etc.) These compounds can contribute to the overall taste and aroma, making some vodkas smoother, cleaner, and more complex than others.

Important Note:

It's worth noting that taste is subjective. While some people may appreciate the subtle nuances of expensive vodka, others may find the cheaper options perfectly satisfying. Ultimately, the best way to decide which vodka is right for you is to try different brands and see what you prefer.