Dr. Ghooi, I hope this is within your area of expertise. If not, perhaps you will suggest another category of expert to which I might turn.

I've just noticed that my hand sanitizers have expiration dates. The active ingredients of all these is alcohol. Does alcohol indeed lose its effectiveness after a certain time? How important is the expiration date?

Hi Richard,
Hand Sanitizers generally do not lose their effectiveness after expiry. Alcohol does not lose its efficacy (you would probably have noted that Chivas Regal (18 year old) is much more expensive and I feel better than Chivas Regal (12 year old).
Expiry dates are important for products which degrade into something toxic, for most other products they really dont matter, but they are put as a result of government regulation.
Best wishes
Ravi Ghooi


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Dr. Ravindra Bhaskar Ghooi


I can provide information on drugs and medicines, their actions, uses, interactions and adverse effects. To avoid confusion, generic names of medicines may please be provided. I am a pharmacologist, having worked on animal and human pharmacology, and presently I am the Dean of Bilcare Research Academy, where we teach courses on clinical research. We dont work on saturdays and sundays, hence questions reachng me on these days will be replied on Monday, please bear with me.

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