Our CF® dye hydrazides are bright, extremely water-soluble and nontoxic. These properties make the dyes excellent fixable polar tracers for microinjection into cells. Hydrazides also can be used for labeling aldehyde or ketone groups, however, for this application we recommend using the more reactive CF® dye aminooxy forms. CF® dyes are Biotium's line of next-generation fluorescent dyes with advantages in brightness, photostability, and conjugate specificity compared to other fluorescent dyes. • Far-red fluorescent CF®647 dye has excitation/emission at 650/665 nm. • UV-excitable blue fluorescent CF®350 dye has excitation/emission at 347/448 nm. • Green fluorescent CF®488A dye has excitation/emission at 490/515 nm. • Orange-red fluorescent CF®555 dye has excitation/emission at 555/565 nm. • Red fluorescent CF®568 dye has excitation/emission at 562/583 nm. • Far-red fluorescent CF®633 dye has excitation/emission at 630/650 nm. • Far-red fluorescent CF®640R dye has excitation/emission at 642/662 nm. • Deep-red fluorescent CF®594 dye has excitation/emission at 593/614 nm. • Blue fluorescent CF®405S dye has excitation/emission at 404/431 nm. • Far-red fluorescent CF®660R dye has excitation/emission at 663/682 nm. • Far-red/near-IR fluorescent CF®680R dye has excitation/emission at 680/701 nm.