Synthesis of Diazodinitrophenol

12 g of picric acid is dissolved in 120 mL of 5% HCl under an ice bath, then a solution is prepared by combining 3.6 g of sodium nitrite and 10 mL of water. The solution is slowly added to the first solution with rapid stirring, the temperature should be maintained below 10°C, the solution is stirred for additional 10 minutes, then filtered and washed with some water. The crude amorphous diazodinitrophenol is recrystallized in hot acetone.

Source

Capture

Addition of the solution

l

The mixture gradually lightens

g

Stirring for additional time

DDNP (3)

The product after the filtration and washing

Picric Acid

The recrystallized product

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