Expiration of chelators and BHT?

Hello people,

    I am skeptical of BB dates of ingredients, since a seller is motivated to SELL, not to necessarily be truthful, if it means lost sales, SO here are my questions:

  I have some sodium phytate, that according to the original package expired 6 months ago. This item is currently in a dark brown plastic bottle that used to have vitamin D tablets in it (if this needed info.). It was always kept in our coolish basement. SHOULD I DISCARD IT, since it's supposedly expired?

    Disodium EDTA: does it need to be discarded if it's old? Again, I sadly do NOT know what its expiration date is/was. This info. is hard to obtain from re-packers of cosmetics ingredients, sadly.

   Tetrasodium EDTA: same question as directly above. 

   I also have some BHT. I never did know its expiration date. It is in a glass jar, in a cardboard box, cool basement. The crystals are YELLOW. They do form clumps, but I just break them up before weighing it out.  I don't recall if it  was yellow when I got it. SHOULD THIS BE DISCARDED?

   

  Thanks so much for any advice you can provide. 

Comments

  • MicroformulationMicroformulation Member, Professional Chemist
    Yes, best practices will dictate that you destroy "expired" or "outdated" materials. It is that simple.
    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications. BS.Pharm Albany College of Pharmacy, Union University.
  • PharmaPharma Member, Pharmacist
    If it's for personal use only, then you may use EDTA and phytate longer, considerably longer. However, excess stock you're not going to use for a while is best kept in the fridge or even freezer.
    BHT is an antioxidant and tends to degrade over time tuning from colourless and transparent to a deep yellow and later orange/red/brown. Best to not use it even if a small percentage of oxidised BHT suffices to turn it visibly yellow.
  • Thanks for the help people!  I shall sadly have to throw out my stuff...sigh...


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