Combine 10 g of dry vanillin, 4 g of anhydrous ammonium acetate, 7 g of nitroethane and 20ml of acetic acid reflux for 5h. Pour the still hot solution to 70g of ice wash the beaker with ice cold water. Let the P2NP crystallize for few hours in a freezer and filter. Recrystallize the P2NP with hot methanol 60:20 water solvent. Use the P2NP immediately it is not stable.
The combined chemicals
Refluxing, the color was more yellow in reality
Poured the hot solution to the ice, it will crystallize in a while