I just started to hunt down some of this chemical. I need to know what type of oxalic acid to buy.Oxalic Acid Anhydrous Crystal or Oxalic Acid Dihydrate Crystal. These are the two types listed. Thanks in advance for your help.
Are you buying oxalic acid or what they have listed,product name:brightener?I was looking to buy oxalic acid in a 50lb. bag locally to avoid shipping. I found a company but they sell two types of this chemical.