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Home Cosmetic Science Talk Cosmetic Industry Career Colouring orthophosphoric acid

  • Colouring orthophosphoric acid

    Posted by DRGHOST on October 19, 2021 at 12:33 pm

    Can methylene blue or alizarin red be used for colouring? If not then what should be used ? 

    DRGHOST replied 1 year, 7 months ago 2 Members · 2 Replies
  • 2 Replies
  • Bill_Toge

    Professional Chemist / Formulator
    October 19, 2021 at 5:46 pm

    quite a few FD&C dyes are acid stable - FD&C Blue 1, FD&C Red 40/Food Red 17, tartrazine/FD&C Yellow 5, Sunset Yellow/FD&C Yellow 6, to name a few


    October 20, 2021 at 6:43 am

    Thank you @Bill_Toge