Anhydrous, Monohydrate or dihydrate???!!! - Blown apart with this querry!!!! (Jan/21/2010 )

Because, using the same reasoning I gave you for preparing a solution, weights are meaningless unless you describe the chemical fully. If it just said 1.2 mg of sodium phosphate monobasic, no one would be able to tell exactly how much monobasic sodium phosphate was in it. 1.2 mg of anhydrous monobasic sodium phosphate in 1 ml is not the same as 1.2 mg of monobasic sodium phosphate monohydrate in 1 ml.

If the label gave the quantities as molarities instead of milligrams, this problem doesn't occur -- saying 8.7 mM sodium phosphate monobasic is accurate and sufficient, saying 1.2 mg of sodium phosphate monobasic is meaningless.

aye aye captain.. point taken!!!

thank you for all the inputs....