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  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

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  DRGHOST

  Member

  October 20, 2021 at 6:43 am

  Thank you @Bill_Toge

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