2,7, Dichlorofluorescein
Hi
I would like to test Fajans's method for Cl- titration with silver nitrate
For this you have to use 2,7, Dichlorofluorescein as indicator
1) I have a lot of fluorescein sodium salt
Is it possible to chlorinated it ? how not sur-chlorinated it ?
It seems like 2,7 DCF is soluble in alcohol.
Tetrachlorofluorescein seems not soluble in alcohol
Is it possible to pass Cl2 gas in fluorescein in alcoholic solution and stop as it all dissolve ?
2) It's possible to synthetise 2,7 DCF by using same method use for Fluorescein by switching phtalic anhydride by the 3,6 Dichloro phtalic anhydride
how to synthetise 3,6 DAP ? (my organic chemistry is a little old)
thanks 
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