2,6-dibromoquinone-4-chloroimide

2,6-Dibromoquinone-4-chloroimide is a colorimetric dye for the detection of phenolic compounds. It produces an indigo dye upon reacting with phenolic compounds at a pH of approximately 9.4. 2,6-Dibromoquinone-4-chloroimide has been used as a Gibbs reagent for the colorimetric detection of phenolic compounds. It has also been used in chromogenic reactions for the quantitative colorimetric detection of aflatoxins, causing colorless aflatoxins to become green with an absorption band at 673 nm.

6-Ethyl-7-hydroxy-4-methylchromen-2-one is a fluorescent dye.

DAPI Dihydrochloride (FxCycle Violet) is a cell-permeable fluorescent probe by binding in the minor grove of A-T rich sequences of DNA, used to stain DNA and chromosomes, with a preference for adenine and thymine rich DNA.

7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one (Compound 1) serves as a fluorescent probe for detecting hydrogen sulfide (H2S). It is characterized by a low detection limit (4×10^-6 mol L), high selectivity, and great sensitivity. At a concentration of 150 µg mL, it exhibits negligible cytotoxicity. The excitation wavelength is 331 nm, while in DMSO solvent, it emits at approximately 385 nm; upon addition of HS-, the fluorescence intensity significantly increases around 392 nm.

bis-ANS is a high-affinity non-covalent extrinsic fluorescent dye used to analyze protein conformation.[1] Its predominant interaction with proteins is through its hydrophobic phenyl and naphthyl rings.[2] bis-ANS has an excitation maxima of 390 nm.[3] It has an emission maximum of 523 nm when free in solution but undergoes a blue shift with an increase in fluorescence intensity when bound to protein; for example, when bound to intestinal fatty acid binding protein (FAPB2) it has emission maxima of 484-496 nm. bis-ANS has been used to label mechanically damaged neurons in acute brain slices.4 It also potently inhibits microtubule assembly.[5],[6]

Biotin-11-dUTP [tetra(triethylammonium) salt] [(2S,3S,4R,5R,6R)-5-(2,4-dioxopyrimidin-1-yl)-4-hydroxy-6-(hydroxymethyl)-2-[(3aR,4S,6R,6aS)-2-oxohexahydro-2H-thieno[3,4-d]imidazol-4-yl]-tetrahydro-2H-furo[3,2-d][1,3,2]dioxaphosphorin-3-yl]phosphonate] is used as a fluorescent substitute for dTTP.

DAPI (dilactate), a blue fluorescent dye, primarily targets and binds to AT clusters within the minor groove of dsDNA, significantly enhancing fluorescence by about 20-fold upon binding. It is particularly effective in staining the nucleus, allowing for clear identification of the cell cycle phases, while it does not stain the cytoplasm. The dilactate form of DAPI exhibits greater water solubility compared to its dihydrochloride counterpart. [1] [2]

1) Non-toxicity: The unique oiliness and high molecular weight characteristics of CelRed prevent it from penetrating cell membranes into cells, and Ames test results also show that the mutagenicity of CelRed dye is much less than EB. 2) High sensitivity: