Does Isopropyl Alcohol Expire?

The answer is yes, isopropyl alcohol does expire. The main thing that causes isopropyl alcohol to expire is evaporation. When isopropyl alcohol evaporates, it leaves behind a residue of impurities. Over time, these impurities can build up and make the isopropyl alcohol less effective. The other thing that can cause isopropyl alcohol to expire is exposure to sunlight. Sunlight can break down the molecules in isopropyl alcohol and make it less effective.

When isopropyl alcohol has expired, it will have a distinct, unpleasant odor. The color may also change from clear to yellow or brown. The expiration date is typically stamped on the bottom of the bottle. If the bottle is unopened, it will be safe to use for up to two years. After the expiration date, the alcohol may not be as effective at killing germs and bacteria.

When isopropyl alcohol expires, it becomes less effective as a disinfectant. The risk of using expired isopropyl alcohol is that it may not be able to kill all the bacteria and viruses on a surface, which could lead to cross-contamination and illness. It is also more likely to cause skin irritation.