• Color and makeup

  Color-Changing D&C Red No. 21 and 27

  Posted by hubahubister on January 30, 2021 at 5:13 am

  Hi All
  I am trying to identify which group/class of this (color-changing) dye D&C Red No. 21 and 27 ( CI45380:2 and CI45410:1 respectively).

  They are solvent dye. To narrow it down further, are they an acid dye or basic dye?
  Appreciate if anyone with more experience can help clarify this.
  Thanks
  Noni

  MelindaNicole replied 2 months ago 2 Members · 1 Reply

  • color
  • color cosmetics
  • lipstick
• 1 Reply

• 

  MelindaNicole

  Member

  March 28, 2023 at 10:35 pm

  The pH color changing is due to bromo acid powder dye that is water insoluble. I bought a couple this past summer but haven’t had a chance to play with them yet.

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