Multiple choice

Which of the following dyes is used in histology for staining formulations ?

  1. Orange G

  2. Methyl red

  3. Methyl orange

  4. Martius yellow
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A Correct answer
Explanation

Orange G or orange gelb is a synthetic azo dye used in histology in many staining formulations. It usually comes as a disodium salt. It has the appearance of orange crystals or powder.

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