Difference between black catechu and pale catechu.

1.	Difference between black catechu and pale catechu.
Answer» Black catechu with FERRIC chloride gives bluish-black color. 2. Black catechu with vanillin or Hydrochloric acid gives RED or PINK color. ... On the other hand, Pale catechu gives the positive result for gambier fluorescein TEST

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Difference between black catechu and pale catechu.

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