The RedSafe™ Nucleic Acid Staining Solution exhibits two fluorescence excitation maxima at 309 nm and 419 nm when bound to nucleic acids and is visible at a wavelength of 514 nm. RedSafe™ Nucleic Acid Staining Solution is as sensitive as EtBr and its usage is similar to EtBr. Compared with EtBr, a potent carcinogen, RedSafe™ Nucleic Acid Staining Solution showed almost no mutation in the Ames test and negative results in mouse marrow chromophilous erythrocyte micronucleus test and mouse spermary spermatocyte chromosomal aberration test. Therefore, we strongly recommend that you select RedSafe™ Nucleic Acid Stainig Solution (20,000x) instead of EtBr to identify nucleic acids on agarose gel.