By the way, Cole-Parmer sells 45% w/w potassium hydroxide for $44 for a 1 L bottle. And that's AR grade, really pure stuff! That will have 655 grams KOH per liter. 500 g of ACS Certified KOH pellets (really pure in solid form) will cost you $76.

It's worth buying it in liquid form in my book. And a lot safer...