Staff Answer
May 29, 2026 - 02:26 PM
When stored properly, in its sealed original container, at room temperature, away from direct sunlight and ignition sources. SDA 40B 200 proof has an indefinite shelf life for most practical purposes. Manufacturers typically guarantee specification compliance for 2–3 years from manufacture. Ethanol is hygroscopic, so once opened, exposure to humid air will gradually reduce proof, keep containers tightly sealed when not in active use to maintain 200 proof purity.
