Home Cosmetic Science Talk Formulating Shelf life of raw materials in products!

  • Shelf life of raw materials in products!

    Posted by Chemist5000 on June 15, 2017 at 6:02 pm
    One of the products my company makes comprised of 99.6% Glycerin.
    The Glycerin from the supplier is given only a 2 year shelf life.
    When we mix the Glycerin with the flavor we are giving it a 3 year shelf life from the date of Compounding.

    How does this work out in giving a shelf life to a final product? Does this depend on just the stability or what?

    Chemist5000 replied 6 years, 9 months ago 4 Members · 4 Replies
  • 4 Replies
  • drbobverdient-biz

    Member
    June 15, 2017 at 6:08 pm
    Final product depends on stability for shelf life-Raw material can be re-analyzed if storage exceeds manufacturers stated shelf life.
  • johnb

    Member
    June 16, 2017 at 8:49 am

    Shelf life information must always be interpreted with considerable caution.

    Often, expiry dates are applied to items purely on a whim without any consideration of what may be considered logical.

    I have seen bags of coal with “best before” dates of 2 years ahead and supermarket packs of salt with similar markings. Don’t the packers realise that these items have been around for gazillions of years and that another 2 or three will make not a jot of difference to their constitution or safety?

  • bill_toge

    Member
    June 16, 2017 at 1:09 pm

    the shelf life is simply the period over which the supplier can guarantee the material will remain fit for use; it may well remain fit for use beyond that time in practise, but the supplier can take no responsibility for it unless it’s re-tested and re-certified with a new expiry date

  • Chemist5000

    Member
    June 16, 2017 at 3:53 pm

    thank you gentlemen!  

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