[brohemath]

I am trying to make my own Zimmerman method reagent based on this formula.

Solution A: 1 gram of 1,3-Dinitrobenzene in 100ml of methanol.

Solution B: 5 gram of potassium hydroxide in 100ml of water.

I was unable to acquire  1,3-Dinitrobenzene at Sigma the only thing I can find is 97% anhydrous basis so I need to know if that will work with the methanol and if so how to calculate the amount needed per L of methanol for this concentration, 1000mg/100ml.

Secondly I was going to acquire the potassium hydroxide in flake form (90% pure with 10% water) but not real confident in my water source purity or adjusting for that  10% water, so the notion to buy a KOH has crossed my mind but what concentration out of the available ones is not known to me,  0.1 M KOH (0.1N), 1.0 M KOH (1.0N) ?

I am also concerned about long term storage of Solution A, if there is a known standard amount of time it retains it's reagent properties under proper storage conditions and what those conditions are, ie. temperature, light exposure, oxidation etc, or if it is necessary

To be clear this is not the Zimmermann-Reinhardt’s reagent for iron.

thank you in advance, any help is appreciated. I do not mind doing the math myself but do not have a whole lot of experience calculating volumes, but willing to practice and get better!

[brohemath]

Is there another more appropriate forum subsection I should post this in?

I looked around and viewed at least 1 other reagent question in this section but if there is another area more specific to reagents someone please let me know.