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Crest White Strips

by blimkie.k
Tags: crest, strips, white
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Jun16-08, 09:26 AM
P: 129
First of all the chemistry behind crest white strips, do they actually work?

I have a package of Crest White Strips Premium plus my friend gave me from his work they have expired are they still effective after expiration date?
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Jun16-08, 10:04 AM
Borek's Avatar
P: 23,592
Check what active ingredient is - that's answer to both your questions

Hydrogen peroxide is a strong oxidizer - so it may work. It is also unstable - so they can be not effective after expiration date, or at least less effective.
Sep1-08, 07:12 PM
P: 10
I would not use it after the expiration date.

Sep2-08, 01:00 PM
Sci Advisor
HW Helper
GCT's Avatar
P: 1,769
Crest White Strips

Hydrogen peroxide decomposes at a fast rate in water, I would still use the product since these strips have Hydrogen Peroxide imbedded in something other than water, however they may not be a great as one which has not exceeded the expiration date. Observe the package , if it seems inflated , than it's probably no good.
Pagan Harpoon
Jan10-12, 04:30 PM
P: 85
My mother swears by them, they definitely work... within the expiration date, at least.

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