an 9

9-Aminoacridine is a highly fluorescent anti-infective dye used clinically as a topical antiseptic and experimentally as a mutagen, due to its interaction with DNA. It is also used as an intracellular pH indicator.

1,8-Diazafluoren-9-one (DFO) is utilized for detecting fingerprints on porous surfaces.

Acid Yellow 9 monosodium salt (Hydrogen 4-aminoazobenzene-3,4'-disulphonate (sodium salt)) is an azo dye, degraded by Pseudomonas fluorescens as a sole source of nitrogen, carbon, and energy for the bacterium.

9-(2,2-Dicyanovinyl)julolidine (DCVJ) is a fluorogenic dye that is considered a fluorescent molecular rotor because its properties depend on the rotational relaxation of the molecule, which can be influenced by the viscosity of the solvent used. It has an excitation maximum at approximately 450 nm, and its emission is approximately 480 or 505 nm for low or high viscosity solvents, respectively. DCVJ has been used to study tubulin dynamics because its fluorescence increases when bound to tubulin sheets but is lower when bound to microtubules.

2,7-Bis(alloxycarbonylamino)-9-chloroacridine serves as a fluorescent label.

10-Methyl-9-(phenoxycarbonyl)acridinium fluorosulfonate, a phenyl ester derivative of acridinium esters, serves as a fluorescent dye exhibiting chemiluminescence in neutral conditions and is utilized in the quantification of hydrogen peroxide [1].

Mca-(Ala7,Lys(Dnp)9)-bradykinin is a fluorogenic substrate that demonstrates high sensitivity for ECE-1 (endothelin-converting enzyme-1). It features a (7-methoxycoumarin-4-yl)acetyl (Mca) group for fluorescence and a 2,4-dinitrophenyl (Dnp) group for quenching, yielding a significant increase in fluorescence when the substrate is cleaved [1].

9-Amino-6-chloro-2-methoxyacridine is a pH-sensitive fluorescent probe commonly used to assess vacuolar pH variations during substrate translocation across the tonoplast through a putative H+ solute antiport system [1].

9-Anthryldiazomethane serves as a fluorescent labeling reagent, utilized in the detection of fatty acids and their derivatives [1].

9-(2-Carboxy-2-cyanovinyl)julolidine (catalog number: T67024, CAS number: 142978-18-5) is a valuable organic compound for life sciences research.

N-(9-Acridinyl)maleimide, a maleimide-type fluorescent thiol reagent, exhibits negligible inherent fluorescence; however, its conjugates with thiol compounds display pronounced blue fluorescence. This characteristic enables its use in the fluorometric analysis of cysteine and glutathione [1].

C.I. Acid Blue 9 is an agent of dye.

Methylene Blue trihydrate (Basic blue 9) is a compound consisting of dark green crystals or crystalline powder, having a bronze-like luster. Solutions in water or alcohol have a deep blue color. Methylene Blue trihydrate is used as a bacteriologic stain and as an indicator. It inhibits soluble guanylyl cyclase and has been used to treat cyanide poisoning and to lower levels of methemoglobin. It also inhibits tau filament formation (IC50: 1.9μM).

5-DTAF, an isomeric derivative of fluorescein, reacts directly with polysaccharides and alcohols in aqueous solutions at pH > 9. Its emission profile peaks at a wavelength of 518 nm following excitation at 488 nm [1].

LucPpy-IN-1 (compound 9) is an inhibitor of ATP-dependent luciferase from Photinus pyralis (lucPpy), exhibiting an IC50 value of 4.0 μM. It is utilized in research to assess the druggability [1] of the target enzyme.

Dnp-PLGLWA-DArg-NH2 TFA, a fluorogenic substrate specifically for MMP-1 and MMP-9, facilitates the quantification of MMP activity at an excitation wavelength of 280 nm and an emission wavelength of 360 nm [1] [2].