What is referred to as grain-derived alcohol at a minimum of 190 proof?

Grain Neutral Spirit (GNS) is defined as a type of alcohol that is distilled from grain and has a high purity level, typically achieving a minimum of 190 proof (95% alcohol by volume). The designation of "neutral" indicates that this spirit has undergone extensive distillation, which effectively removes many of the flavors and impurities associated with the original grain, resulting in a clean and neutral flavor profile.

This high level of purity means that GNS can serve as a base for a variety of alcoholic beverages and is often used in the production of vodka, liqueurs, and other mixed drinks. Its classification as "grain-derived" highlights that the source material for distillation is grains like corn, wheat, rye, or barley.

In contrast, while the term "neutral spirit" could also be applied generally to the same product, it lacks the specificity of "grain." The other options, such as high-strength ethanol and malted spirit, do not conform to the definition required for GNS, as they either refer to different types of spirits or processes. Thus, Grain Neutral Spirit is the most accurate term for the alcohol described in the question.