Home Cosmetic Science Talk General Suggest reason(s) of those problems

  • Suggest reason(s) of those problems

    Posted by fekher on October 11, 2023 at 5:34 pm

    *For hand soap contains: distilled water, CAPB, N70, NaCl, perfume, colorant, Cocoamide DEA, cathon cg 0.1%<div>

    I have discoloration and bad odor of some samples after just 3 months

    *For perfume which contains just alcohol, distilled water, perfume I

    have discoloration

    *For shower gel contains : distilled water, CAPB, N70, NaCl, perfume, colorant, Cocoamide DEA, Pq 7,cathon cg 0.1%

    I have discoloration of some samples after just 3 months.


    Can you suggest please the reason of such results.

    Our guess in company is may ( bad quality of color, weak Preservative and contamination in water)


    @ozgirl @Perry44 @chemicalmatt @Pharma @Abdullah @Chemist77 @Graillotion @ngarayeva001

    </div>

    • This discussion was modified 4 months, 2 weeks ago by  Fekher.
    fekher replied 4 months, 2 weeks ago 5 Members · 15 Replies
  • 15 Replies
  • ozgirl

    Member
    October 11, 2023 at 5:46 pm

    Microbial contamination is your most likely reason for the bad odor. What is your pH? Kathon CG is best up to pH 7 with some activity up to pH 8.

    What type of discoloration? What colorant are you using? Is the color fading (UV stability of dye) or is it turning yellow/brown (fragrance oxidation)?

    You can change packaging to opaque or use PET with UV filters to help reduce color changes.

    • fekher

      Member
      October 11, 2023 at 5:53 pm

      The pH is 7, discoloration going from pink to no coloration and it is liquid colorant that I did not know it’s origin.

      • fekher

        Member
        October 11, 2023 at 6:00 pm

        I can not change packaging I should find solution with a transparent package even in market there are same product with transparent package so there is solution even in such packaging

        • ozgirl

          Member
          October 12, 2023 at 6:41 pm

          You can get clear PET bottles with UV Filters in the plastic that reduce the impact of UV on your product.

      • ozgirl

        Member
        October 12, 2023 at 6:40 pm

        Using a colorant that you don’t know its origin is concerning from a safety point of view.

        It also means that you can’t really trouble shoot the issue because you don’t know what you are working with. I would look for a different colorant with a known origin.

        • fekher

          Member
          October 13, 2023 at 2:44 pm

          Thanks a lot for your suggestion, especially uv filtring packaging nice new information 😊

  • PhilGeis

    Member
    October 11, 2023 at 5:48 pm

    smell and color change - prob should culture. What are pH’s of products?

    • fekher

      Member
      October 11, 2023 at 5:54 pm

      Shower gel and hand liquid soap have 7 as pH

  • fekher

    Member
    October 11, 2023 at 5:56 pm
  • ketchito

    Member
    October 11, 2023 at 10:39 pm

    In the case of your perfume, do you use colorants as in your other products? Do you also perceive bad olor?

    • fekher

      Member
      October 11, 2023 at 11:48 pm

      Yes In perfume I also use colorant and no the perfume did not change the odor.

      • ketchito

        Member
        October 12, 2023 at 10:51 pm

        You mighr be experiencing two different issues at the same time: color loss due to dye oxidation (for this a UV filter is needed), and product contamination (review your preservative system).

        • fekher

          Member
          October 13, 2023 at 2:46 pm

          Thanks a lot for your comments.

  • JOJO91343

    Member
    October 11, 2023 at 11:51 pm

    If the Bad odor is fishy, it could be because of Cocamide DEA which stands for Cocamide Diethanol amine and the odor of amine is fishy

    • fekher

      Member
      October 12, 2023 at 11:45 am

      The level of cocoamide DEA is low near to 1% so I don’t go with your guess but maybe.

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