Disulfo-ICG carboxylic acid is a derivative of ICG dye. ICG (Indocyanine Green) is a NIR fluorescent dye[1].
References
[1] Valentijn, et al. Synthesis and systematic evaluation of symmetric sulfonated centrally C-C bonded cyanine near-infrared dyes for protein labelling[J].Dyes and Pigments, 2016.
