Identification Of Hollow Capsules

Identification:

(1) Take 0.25g of this product, add 50ml of water, heat to melt, let cool, take 5ml of the solution, add a few drops of the mixture of potassium dichromate test solution-dilute hydrochloric acid (4:1) to form orange flocculent precipitate .

(2) Take 1ml of the remaining solution under the identification (1), add 50ml of water, shake well, add a few drops of the tannic acid test solution, and it will become turbid.

(3) Take about 0.3g of this product, put it in a test tube, add a little soda lime, and heat it. The gas generated can make the wet red litmus paper turn blue.