The chemical Sulfo-SANPAH has a designated molecular formula of C16H17N6NaO9S and a molecular weight of 492.395 g/mol. Synonyms may include: Sulfosuccinimidyl 6-((4-azido-2-nitrophenyl)amino)hexanoate, 1-((6-((4-Azido-2-nitrophenyl)amino)-1-oxohexyl)oxy)-2,5-dioxo-3-pyrrolidinesulfonic acid, Ssanpah, Sulfo sanpah, Sulfo-sanpah, Sulfosuccinimidyl 6-(4'-azido-2'-nitrophenylamino)hexanoate (ChemID).