I was just trying to help.
Also note there are two forms of sodium metaborate, -4mol and Kodalk. Silverprint used to sell Kodalk.
It's discussed here:
It would be of interest to check with Moersch they sell Kodalk if you use this supply.
Wow, this is enlightening. Never had an inkling that sodium metaborate could be so confusing. It would seem the moral of the story is to always use Kodalk, and hope the publisher of whatever formula you're using had it in mind.
Sodium metaborate is not any different from any other chemicals. You must know the hydration form called for in the formula. Another example would be sodium carbonate -- anhydrous or monohydrate? Unfortunately many formulas are not written in a very accurate form.
@Alan: Moersch does sell Sodium Metaborate through Fototechnik Suvatlar, see my previous post here in this thread.
There are 3 hydration forms of sodium metaborate' as evidenced by 3 CAS numbers
Anhydrous (NaBO2) CAS 7775-19-1
A dihydrate (NaBO2.2H2O or as Na2B2O4.4H2O ) CAS 16811-11-6
A tetrahydrate (NaBO2.4H2O or as Na2B2O4 .8H2O) CAS 10555-76-7
Things are made rather confusing by representing the anion in two different forms BO2- or as B2O4-2. Once the anion is represented the same way it is easy to see the different forms.
The tetrahydrate converts to the dihydrate above 53.6C (128F).