Crest White Strips: Do They Work After Expiration?

  • Thread starter Thread starter blimkie.k
  • Start date Start date
Click For Summary

Discussion Overview

The discussion centers on the effectiveness of Crest White Strips after their expiration date, focusing on the chemistry involved, particularly the role of hydrogen peroxide as an active ingredient. Participants explore whether the strips retain their efficacy post-expiration and share personal experiences and recommendations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the effectiveness of expired Crest White Strips and seeks clarification on the chemistry behind them.
  • Another participant suggests that the active ingredient, hydrogen peroxide, may still work as it is a strong oxidizer, but notes its instability could lead to reduced effectiveness after expiration.
  • One participant expresses a personal stance against using the strips after the expiration date.
  • A different viewpoint indicates that while hydrogen peroxide decomposes quickly in water, the strips may still be usable due to their formulation, although they might not be as effective as fresh ones. They recommend checking the package for signs of damage.
  • Another participant shares anecdotal evidence, stating that their mother finds the strips effective within the expiration date.

Areas of Agreement / Disagreement

Participants express differing opinions on the use of expired Crest White Strips, with some advocating against their use while others suggest they may still be effective. The discussion remains unresolved regarding the efficacy of the product post-expiration.

Contextual Notes

There are uncertainties regarding the stability of hydrogen peroxide in the strips and the implications of the expiration date on their effectiveness. Participants do not reach a consensus on whether the strips should be used after expiration.

Who May Find This Useful

Individuals interested in dental care products, particularly those considering the use of Crest White Strips past their expiration date, may find this discussion relevant.

blimkie.k
Messages
130
Reaction score
0
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?
 
Chemistry news on Phys.org
Check what active ingredient is - that's answer to both your questions :wink:

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.
 
Last edited by a moderator:
I would not use it after the expiration date.
 
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.
 
My mother swears by them, they definitely work... within the expiration date, at least.
 

Similar threads

Induction heating of aluminum strip possible?
  • · Replies 12 ·
Replies
12
Views
2K
Guidance for using mica strip heaters
  • · Replies 1 ·
Replies
1
Views
459
Hydrochloric Acid, NaOH, and English Ivy
  • · Replies 21 ·
Replies
21
Views
7K
Mechanical problem -- Joining 2 metal strips with some sort of hinge
  • · Replies 5 ·
Replies
5
Views
2K
Trying to estimate the force required to roll form a strip of aluminum
  • · Replies 13 ·
Replies
13
Views
2K
Point of particular Doonesbury strip?
  • · Replies 37 ·
2
Replies
37
Views
1K
What Is the White Powder from Ultrasonic Humidifiers and Is It Harmful?
  • · Replies 43 ·
2
Replies
43
Views
23K
Can RGB LED simulate incandescent bulb 'glow'?
  • · Replies 3 ·
Replies
3
Views
3K
Grocery Stores, Returning Sealed Perishable Items, < 4 Hours after purchase?
  • · Replies 15 ·
Replies
15
Views
6K
Job Skills Degrees with actual guaranteed jobs after graduation?
  • · Replies 80 ·
3
Replies
80
Views
6K