Do somebody knows how to get 2-7 naphtalene disulfonic acid?

[Jose Claudio Perez-Diaz]

Dear users:

I=B4m trying to make silver staining of a gel and I need 2-7 naphtalene
disulfonic acid.
Do somebody knows how to get it? or Do somebody knows where to purchase it?
If somebody knows, please contac to me.
Thank you in advance.


J.Claudio Perez Diaz
Microbiology Department.
Hospital Ramon y Cajal
Madrid=20
Spain