yellow isopropanol

Wolfgang Schechinger wolfsc at
Sat Jan 26 09:21:54 EST 2002

Probably some reaction product of thiocyanate.


> ...when precipitating RNA using isopropanol (Trizol method) the isopropanol
> turns light yellow after about 20 minutes at room temp, and becomes dark yellow
> (along with the RNA pellet) after a few hours at -20 deg.
> Why is this?
> Ty

Dr. Wolfgang Schechinger
Institute of Biomedical Sciences
Academia Sinica, Taipei, Taiwan R.o.C.


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