Question

Distinguish between pale catechu and black catechu

Answer 1

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.

Answer 2

Answer:

BLACK CATECHU:

• Black Catechu consist of the dried extract
• Black Catechu consist the dried extract leaves of the Acacia plants.
• The Black catechu belongs to the family of the leguminose. It is also called mimosa catechu.
• It is  commonly called as khadira.

PALE CATECHU:

• Pale Catechu  is an aqueous extract of the leaves of the young twigs of the Uncaria Gambir Roxburg.
• The pale belongs to the family of Rubiacae.
• Black catechu occurs in black cakes and cubes. Black and  pale Catechu are sold under the same name.