I want to synthesize PEDOT and de dope this polymer

I will conduct the experiment like below method.

I have a question. which hydrazine can I use?

Hydrazine anhydrous? or Hydrazine monohydrate?

The monomer is easily polymerized due to its low oxidation potential. The polymerization procedure is depicted as follows: 0.591 g EDOT and 2.08 g FeCl3 were mixed under nitrogen with 20 ml freshly distilled CHCl3 in a 50 ml three-necked flask with magnetic stirring. The reaction lasted for 48 h at room temperature. After filtration of CHCl3, the black compound was washed with dilute hydrochloric acid, distilled water, and then was extracted by ethanol in a Soxhlet extractor, dried at 80 ◦C in an oven to constant weight (0.581 g, yield 98.3%). The polymer was stirred in hydrazine for 5 h to de-dope, then was filtered. The black solid was extracted in Soxhlet extractor one more time with ethanol. After drying to constant weight, 0.577 g black powder was obtained