Cosmetic Science Talk

Cosmetic Science discussion form. For people who want for formulate cosmetics and get advice from other formulators around the world.

Home Cosmetic Science Talk Science Hydrosol without preservative

  • Hydrosol without preservative

    Posted by Karo_lina on January 20, 2022 at 8:18 am

    Is it possible for the hydrosol without preservatives to have an expiry date of one year? My supplier says that he use  special production method that guarantees a long expiration date despite the lack of a preservative.
     Is it possible?

    mikethair replied 1 year ago 4 Members · 5 Replies
  • 5 Replies
  • mikethair

    Member
    January 21, 2022 at 10:22 pm
    We purchase hydrosols without preservatives, and on arrival at our production facility, they are tested in our microbial lab. And again, before the product is released to consumers.
    We buy another ingredient from a different company that has preservatives added (it’s Floral Water). More often than not it arrives with a high microbial count. They say there are issues with their RO water.
    I don’t take any notice of marketing hype from ingredient sellers.
  • PhilGeis

    Member
    January 21, 2022 at 2:22 pm

     Hydrosols like essential oils can differ profoundly from batch to batch.
    No way has your supplier determined specific components essential  for effective preservation - much less ensure each batch is so composed.

  • Karo_lina

    Member
    January 21, 2022 at 1:10 pm

    0,028 %  :D  

  • Abdullah

    Member
    January 21, 2022 at 11:18 am

    Karo_lina said:

    PhilGeis said:

    I know some claim their hydrosols need no preservatives as raw material- since filled hot in sanitized containers.    Even if always effective (doubt that) - time would not be a factor - only exposure to potential contamination (PAO would actually have some validity).
    Method (physical) control in manuf doesn’t reasonably do anything for an ex. date. 
    “Special production method” challenge them to prove it.

    I contacted the supplier and I received this message:
    “The tests showed that the hydrosol is stable for at least 2 years after production, the durability of the product may also be influenced by the high content of essential oils, which themselves prevent contamination.”

    By high content they mean at least what percentage? They have less than 1% essential oil and that is not enough as preservative. 

  • Karo_lina

    Member
    January 21, 2022 at 10:25 am

    PhilGeis said:

    I know some claim their hydrosols need no preservatives as raw material- since filled hot in sanitized containers.    Even if always effective (doubt that) - time would not be a factor - only exposure to potential contamination (PAO would actually have some validity).
    Method (physical) control in manuf doesn’t reasonably do anything for an ex. date. 
    “Special production method” challenge them to prove it.

    I contacted the supplier and I received this message:
    “The tests showed that the hydrosol is stable for at least 2 years after production, the durability of the product may also be influenced by the high content of essential oils, which themselves prevent contamination.”

  • PhilGeis

    Member
    January 20, 2022 at 12:40 pm

    I know some claim their hydrosols need no preservatives as raw material- since filled hot in sanitized containers.    Even if always effective (doubt that) - time would not be a factor - only exposure to potential contamination (PAO would actually have some validity).
    Method (physical) control in manuf doesn’t reasonably do anything for an ex. date. 
    “Special production method” challenge them to prove it.