Does anyone have a standardized method for making a 1 mM solution of TAPP (meso-tetrakis-4-amino phenyl porphine, mol. wt. 674.9) in water?

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Gudrun Lang

1 molar is 674,9 g of the substance in 1000 ml water.

1 millimolar is 0,6749 g of the substance in 1000 ml water.

Or 674,9 milligram in 1000 ml water.

Cyrus B. Toorkey

Thank you for your response. I am well aware of the mathematical calculations for making molar and millimolar solutions.

Perhaps I should have pharased the question differently the difficulty I encounter is in solubilizing TAPP in distilled water.

Was wondering if others who use TAPP had suggestions on how to make stock solutions in d/w.