PH Indicators

Pyranine (HPTS; Solvent Green 7) hydrate is a cell-impermeant pH-sensitive fluorescent indicator. Pyranine hydrate acts as a class of fluorescent chemosensor for the Cu⁺ ion. Pyranine hydrate is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm).

Chlorophenol red (Dichlorophenolsulphonephthalein) is a multifunctional dye. Dyes are important tools in biological experiments. They can help researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology and monitor microorganisms. Their applications range from basic scientific research to clinical A wide range of diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as in emerging fields such as functional textile processing, food pigments and dye-sensitized solar cells.

TME-HYM (PH Probe) is a novel fluorescent probe based on acidic tumor microenvironment (TME) activation and organic anion transporting polypeptide (OATPs, overexpressed on cancer cells), and can be selective uptaken. TME-HYM (PH Probe) can selectively lit up cancer cells and tumor tissues, offering dual tumor selectivity for precise visualization of tumor mass.

Flubida-2 is a cell permeable dye which can be hydrolyzed to Fubi-2 by endoesterases in cells (after hydrolysis, Ex=492 nm, Em=517 nm). Flubida-2 can be used to detect pH at a specific site in a cell organelle by directing the probe to where avidin fusion proteins are located.

Flubi-2 is a fluorescein-biotin based pH-ratio dye (Ex=480 nm, Em= 520-560 nm) with a pK value of 6.7. Flubi-2 is a hydrolysis product of Flubida-2 (non-fluorescent, membrane permeable). Flubi-2 can be used for pH determination of organelles of the secretory pathway (such as golgi apparatus and endoplasmic reticulum) in living cells.

1,4-Diacetoxy-2,3-dicyanobenzene is a cell-permeable fluorescent probe. 1,4-Diacetoxy-2,3-dicyanobenzene crosses the cell membrane and is cleaved by cytosolic esterases to the fluorescent pH indicator 2,3-dicyano-hydroquinone (DCH). 1,4-Diacetoxy-2,3-dicyanobenzene can be used to monitor intracellular pH.

Cresol Red sodium is a triarylmethane dye. Cresol Red sodium can be used for indicating pH, temperatures and salinities.

5(6)-Carboxyfluorescein diisobutyrate is a protected 5(6)-carboxyfluorescein. 5(6)-carboxyfluorescein is a fluorescence pH indicator.

Bromocresol green sodium is an anionic dye. Bromocresol green sodium can be used for pH indication and DNA agarose gel electrophoresis. Bromocresol green sodium is also used in mammalian albumin measurement. Bromocresol green sodium deprotonates and produces the monoanionic form of yellow colour at lower pH (acidic condition), and produces dianionic blue colour at the basic condition.

BP Fluor 532 NHS ester is an amine reactive, yellow-emitting dye routinely used to label proteins or antibodies through primary amines (Lys), amine-modified oligonucleotides, and other amine-containing biomolecules. The labeling occurs most efficiently at pH 7-9 and forms a stable, covalent amide bond. BP Fluor 532 is a bright yellow-fluorescent dye with pH insensitive emission from pH 4 to pH 10. The excitation of BP Fluor 532 is ideally suited for the frequency-doubled Nd:YAG laser line. BP Fluor 532 can be conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates, and is often used for the generation of stable signals in imaging and flow cytometry.