Home Cosmetic Science Talk Formulating Color Changes in Hand Wash

  • Color Changes in Hand Wash

    Posted by Danger on June 13, 2020 at 2:41 am

    Hi,

    I am making a hand wash with this is formula :
    SLES 10%, Potasium Cocoyl glycinate 8%, Lauramine oxide 8%, Fragrances 1%, PEG-40 Hydrogenated Castor Oil 2%, Colorant (red) water soluble 0.01%, Propylen glycol qs, Na2EDTA qs, Phenoxyethanol 0.5%, Aqua ad 100%.

    After 1 week in room temperature the red color changed to brown-orange. 
    What makes the color changes ? Reaction between surfactant and the fragrance ? Or the colorants was oxidized ? Or any unsuitable surfactants i’ve used in the formula ?

    Thank you for all the suggestions. 

    Harry-Indonesia

    chemist77 replied 3 years, 8 months ago 3 Members · 4 Replies
  • 4 Replies
  • belassi

    Member
    June 13, 2020 at 2:24 pm

    Unsuitable dye type.

  • Danger

    Member
    June 15, 2020 at 1:21 am

    What dye type suits ? 

  • belassi

    Member
    June 15, 2020 at 2:38 pm

    Colours are regulated and (1) must be accepted by the cosmetics industry and (2) you must test for stability. I don’t know where your location is so I can’t comment further. Obviously in your case (2) has not succeeded.

  • chemist77

    Member
    July 13, 2020 at 5:52 am

    Try a sample without fragrance too, who knows???

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