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pH probes

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49

Inhibitors & Agonists

31

Fluorescent Dye

1

Isotope-Labeled Compounds

3

Click Chemistry

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Cat. No. Product Name Target Research Areas Chemical Structure
  • HY-W110898

    Fluorescent Dye Others
    Nile blue chloride is a highly fluorescent and photostable organic dye. Nile blue chloride and fluorescein isothiocyanate (FITC) can be used to construct a ratiometric pH sensitive probe for tracking the pH of the extracellular fluid between cancer cells in realtime. Nile Blue chloride has the potential for the research of nonlinear optics .
    Nile blue chloride
  • HY-D1694

    Fluorescent Dye Others
    LysoTracker Yellow HCK 123 is a potent yellow membrane-permeable fluorescent probe. LysoTracker Yellow HCK 123 is a weakly basic amine that selectively accumulates in cellular compartments with low luminal pH .
    LysoTracker Yellow HCK 123
  • HY-118155

    ACMA

    Fluorescent Dye Others
    9-Amino-6-chloro-2-methoxyacridine is a pH sensitive fluorescent probe. 9-Amino-6-chloro-2-methoxyacridine has been frequently used to measure changes in vacuolar pH when a specific substrate crosses the tonoplast through a putative H +/solute antiport system .
    9-Amino-6-chloro-2-methoxyacridine
  • HY-20794

    Fluorescent Dye Others
    8-Hydroxyjulolidine is a chromophore moiety of a fluorescent probe for the detection of weak acid ions. 8-Hydroxyjulolidine can be used to synthesize the salicylaldehyde derivative 9-formyl-8-hydroxyjulolidine, which exhibits sensitive detection ability to pH changes of hydrogen sulfide and silicate in aqueous solution .
    8-Hydroxyjulolidine
  • HY-145576B

    Fluorescent Dye Others
    2-Amino-8-oxononanoic acid (hydrochloride) is the hydrochloride form of 2-Amino-8-oxononanoic acid. 2-Amino-8-oxononanoic acid is an amino acid, incorporation into proteins in E.coli in genetic. 2-Amino-8-oxononanoic acid is efficient in labeling of proteins with different probes with a site-specific manner under a mild condition close to the physiological pH .
    2-Amino-8-oxononanoic acid hydrochloride
  • HY-D1591

    Fluorescent Dye Others
    BODIPY R6G methyl ester (compound 5′-1) is a BODIPY-like fluorescent dye with good light stability and insensitive to pH value. BODIPY R6G methyl ester shows good photostability, high sensitivity and insensitive to pH value. BODIPY R6G methyl ester can be used in research areas such as photodynamic research, PH probes, ion recognition, photocatalysis, protein labeling, cell imaging, and proteomic analysis .
    BODIPY R6G methyl ester
  • HY-D1457

    Fluorescent Dye Others
    DND-189, a low-pH fluorescent probe, is sensitive to neutral and low pH range. DND-189 can be used to measure the pH of acidic organelles .
    DND-189
  • HY-149680

    Ser/Thr Protease Others
    CatD-P1is a pH insensitive CatD (Cathepsin D) probe .
    CatD-P1
  • HY-145576

    Fluorescent Dye Others
    2-Amino-8-oxononanoic acid is an amino acid, incorporation into proteins in E.coli in genetic. 2-Amino-8-oxononanoic acid is efficient in labeling of proteins with different probes with a site-specific manner under a mild condition close to the physiological pH .
    2-Amino-8-oxononanoic acid
  • HY-W411215

    Fluorescent Dye Others
    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 .
    1,4-Diacetoxy-2,3-dicyanobenzene
  • HY-157036

    Fluorescent Dye Others
    INSA is a a pH-sensitive fluorescent probe. INSA can simultaneously light up mitochondria (red emission) and lysosomes (green emission) for their internal pH differences .
    INSA
  • HY-163146

    Fluorescent Dye Cancer
    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 .
    TME-HYM (PH Probe)
  • HY-D1094

    SNARF 1

    Fluorescent Dye Others
    Carboxy-SNARF 1 (5/6-mixture) (SNARF 1) is a fluorescent probe that is sensitive to pH. Carboxy-SNARF 1 (5/6-mixture) can be used for measurement pH .
    Carboxy-SNARF 1 (5/6-mixture)
  • HY-W800696

    Fluorescent Dye Others
    BP Fluor 430 Azide is a water-soluble, green-fluorescent, azide-activated probe that reacts with terminal alkynes via a copper-catalyzed click reaction (CuAAC). It also reacts with strained cyclooctyne via a copper-free click chemistry reaction to form a stable triazole and does not require a Cu-catalyst or elevated temperatures. BP Fluor 430 is a bright, photostable, green-fluorescent probe with excitation near its absorption maximum at 432 nm and emission maximum at 539 nm. This probe is water soluble and pH-insensitive from pH 4 to pH 10. A next generation probe, BP Fluor 430 Picolyl Azide, is also available for detection of low abundance alkyne-tagged biomolecules.
    BP Fluor 430 azide
  • HY-W800698

    Fluorescent Dye Others
    BP Fluor 430 Alkyne is a green-fluorescent alkyne-activated probe routinely used for imaging of moderate to high abundance azide-containing biomolecules. BP Fluor 430 Alkyne reacts with azides via a copper-catalyzed click reaction (CuAAC) to form a stable triazole linker. BP Fluor 430 is a bright, photostable, green-fluorescent probe optimally excited near 430 nm. This probe is water-soluble and its fluorescence is pH independent over a wide pH range.
    BP Fluor 430 alkyne
  • HY-D2119

    Fluorescent Dye Cancer
    CQ-Lyso is a lysosome-targeting chromenoquinoline. CQ-Lyso is a fluorescent probe for measuring the pH of lysosomes in living cells using only single wavelength excitation. CQ-Lyso can visualize the dynamic pH changes in lysosomes .
    CQ-Lyso
  • HY-D1093

    Fluorescent Dye Others
    Carboxy SNARF-1, acetoxymethyl ester (5/6-mixture) is a fluorescent probe that is sensitive to pH. Carboxy SNARF-1, acetoxymethyl ester (5/6-mixture) can be used for measurement of intracellular pH .
    Carboxy SNARF-1, acetoxymethyl ester (5/6-mixture)
  • HY-136672

    Fluorescent Dye Others
    (E)-HBT-O is an isomer of HBT-O. HBT-O is a fluorescent probe used to monitor subtle pH fluctuations in living cells .
    (E)-HBT-O
  • HY-173176

    Biochemical Assay Reagents Others
    4-(2-Azidoethyl)phenol (Ph_N3) is a clickable APEX2 probe. 4-(2-Azidoethyl)phenol (Ph_N3) exhibits reliable labeling ability and enabled two biotinylation routes for downstream analysis .
    4-(2-Azidoethyl)phenol
  • HY-130027
    HKOCl-4
    1 Publications Verification

    BXY2142

    Fluorescent Dye Others
    HKOCl-4 (BXY2142) is a rhodol-based yellow fluorescent probe for the detection of hypochlorous acid with excellent sensitivity and selectivity . HKOCl-4 has longer absorption wavelength and better pH stability compared with fluorescein-based probes. Ex: 530 nm; Em 557 nm.
    HKOCl-4
  • HY-D1556

    1,2-dioleoyl-sn-glycero-3-pHospHoethanolamine-N-(carboxyfluorescein) ammonium

    Fluorescent Dye Others
    DOPE-CF is a pH-sensitive fluorescent membrane labelled probe with a fluorescein moiety that is a weak acid and a conjugated base that is highly fluorescent and can be attached to phospholipid ethanolamine lipids .
    18:1 PE CF
  • HY-15923

    Reactive Oxygen Species Others
    MAOS is a modified Trinder’s reagent that can be used as a chromogenic probe for the determination of H2O2. MAOS is strongly dependent on the pH of the reaction medium .
    MAOS
  • HY-129097

    Fluorescent Dye Others
    FFN-102 trifluoroacetate is an analogue of biogenic neurotransmitters. FFN-102 trifluoroacetate is a pH-dependent fluorescent probe that labels dopamine cell bodies, axons, and presynaptic terminals .
    FFN-102 trifluoroacetate
  • HY-D0050

    Fluorescent Dye Others
    5(6)-Carboxy-2',7'-dichlorofluorescein diacetate N-succinimidyl ester (cDCFDASE) is a fluorescent probe. 5(6)-Carboxy-2',7'-dichlorofluorescein diacetate N-succinimidyl ester can be used to evaluate the intracellular pH (pHin) of living cells at a medium pH (pHex) .
    5(6)-Carboxy-2',7'-dichlorofluorescein diacetate N-succinimidyl ester
  • HY-D0140

    ETH 5294

    Fluorescent Dye Others
    Chromoionophore I (ETH 5294) is a hydrophobic pH indicator. Chromoionophore I is used as a transmissive or fluorescent probe molecule in many types of hydrophobic sensor membranes. Chromoionophore I is oil-soluble .
    Chromoionophore I
  • HY-155717

    Autophagy Pim Cancer
    NDBM is a probe and binds to tumor-specific Pim-1 kinase, releases strong fluorescence, and produces cytotoxicity, thus achieving cell screening and killing effects. NDBM can specifically target lysosomes and sensitively respond to pH. NDBM can be used to track the pH changes in the intracellular environment under conditions of autophagy and external stimulation .
    NDBM
  • HY-147104

    Fluorescent Dye Others
    Fmoc-Lys(5-FITC)-OH is a marker for polypeptides or proteins. FITC is a fluorescence probe for the labeling of amines. FITC is a pH- and Cu 2+-sensitive fluorescence dye .
    Fmoc-Lys(5-FITC)-OH
  • HY-D2379

    Fluorescent Dye Endocrinology Cancer
    HMRG is a type of hydroxymethyl rhodamine green fluorescent scaffold, featuring an open non-cyclic structure. HMRG can produce significant dynamic fluorescence changes through a one-step enzymatic reaction at physiological pH, which is useful for developing various probes. Fluorescent probes based on HMRG can be used for fluorescence detection of diseases such as tumors and diabetic nephropathy .
    HMRG
  • HY-W800831

    Fluorescent Dye Others
    Tetra-sulfo-Cy7 DBCO is a bright and photostable near-IR probe. The Cy7 DBCO is water-soluble, hydrophilic dye often a reagent of choice for assay where minimal non-specific binding and exceptional brightness is required. The fluorescence of Cy7 DBCO is pH insensitive from pH 4 to pH 10 and produces minimal autofluorescence of biological specimens in this region of the spectrum. Fluorescence of this long-wavelength Cyanine dye is not visible to the human eye but is readily detected by most imaging systems.
    Tetra-sulfo-Cy7 DBCO
  • HY-15942
    5-TAMRA
    2 Publications Verification

    Fluorescent Dye Others
    5-TAMRA can produce bright, pH-insensitive orange-red fluorescence (excitation and emission extremes of 546/579) and has good photostability. 5-TAMRA is mainly used as a fluorescent marker for the synthesis and study of specific oligonucleotide probes .
    5-TAMRA
  • HY-151544

    Fluorescent Dye Others
    PNE-Lyso is a activatable fluorescent probe. PNE-Lyso can be used to detect intracellular pH and hexosaminidases with two kinds of fluorescence signals. PNE-Lyso can be used to distinguish apoptosis from necrosis through visualizing lysosome morphology. PNE-Lyso is capable of investigating the agent-induced cell death process .
    PNE-Lyso
  • HY-D1688

    Fluorescent Dye Others
    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 .
    Flubida-2
  • HY-15940
    5(6)-Carboxyfluorescein
    3 Publications Verification

    5(6)-FAM; 5-(and-6)-Carboxyfluorescein mixed isomers

    Fluorescent Dye Cancer
    5(6)-Carboxyfluorescein (5(6)-FAM) is an amine-reactive pH-sensitive green fluorescent probe. 5(6)-Carboxyfluorescein (5(6)-FAM) can be used to label proteins, peptides and nucleotides. 5(6)-Carboxyfluorescein can be used for the detection of tumour areas in vivo .
    5(6)-Carboxyfluorescein
  • HY-D1156

    Reactive Oxygen Species Fluorescent Dye Others
    HKSOX-1m (5/6-mixture) is a O2 fluorescent probe for mitochondria-targeting (Ex/Em=509/534nm; green), exhibiting excellent selectivity and sensitivity toward O2 over a broad range of pH, strong oxidants, and abundant reductants found in cells .
    HKSOX-1m (5/6-mixture)
  • HY-D1156A
    HKSOX-1m (5/6-mixture) hydrobromide
    1 Publications Verification

    Reactive Oxygen Species Fluorescent Dye Others
    HKSOX-1m (5/6-mixture) hydrobromide is a O2 fluorescent probe for mitochondria-targeting (Ex/Em=509/534nm; green), exhibiting excellent selectivity and sensitivity toward O2 over a broad range of pH, strong oxidants, and abundant reductants found in cells .
    HKSOX-1m (5/6-mixture) hydrobromide
  • HY-124473

    NapHthafluorescein

    HIF/HIF Prolyl-Hydroxylase Cancer
    Naphthofluorescein inhibits the interaction between HIF-1 and Mint3. Naphthofluorescein suppresses Mint3-dependent HIF-1 activity and glycolysis in cancer cells and macrophages without cytotoxicity in vitro and adverse effect in vivo . Naphthofluorescein is also a fluorescent pH-sensitive probe that can be used for functional Cerenkov imaging .
    Naphthofluorescein
  • HY-W800699

    Fluorescent Dye Others
    BP Fluor 430 DBCO reacts with azides via a copper-free click chemistry reaction to form a stable triazole and does not require a Cu-catalyst or elevated temperatures. In applications where the presence of copper is a concern, BP Fluor 430 DBCO is an ideal alternative to copper requiring fluorescent alkynes. BP Fluor 430 is a bright, photostable, green-fluorescent probe optimally excited near its absorption maximum at 432 nm. Its emission peak at 539 nm is pH independent over a wide pH range. BP Fluor DBCO reagent is not suitable for staining intracellular components of fixed and permeabilized cells due to high backgrounds.
    BP Fluor 430 DBCO
  • HY-D2324

    Fluorescent Dye Others
    EE-Flipper 33 is a Flipper probe designed to evaluate the mechanism of early endocytosis. EE-Flipper has a pKa value of 10.6 and is capable of tracking approximately 70% of early endosomes (EE) in live cells. Furthermore, EE-Flipper 33 can also label the Golgi apparatus in live cells with an internal pH ranging from 6.0 to 6.7 .
    EE-Flipper 33
  • HY-B1422
    9-Aminoacridine
    2 Publications Verification

    Aminacrine

    Bacterial HIV Infection
    9-Aminoacridine, a fluorescent probe, acts as an indicator of pH for quantitative determination of transmembrane pH gradients (inside acidic). 9-Aminoacridine is an antimicrobial. 9-Aminoacridine exerts its antimicrobial activity by interacting with specific bacterial DNA and disrupting the proton motive force in K. pneumoniae. 9-Aminoacridine is a HIV-1 inhibitor and inhibits HIV LTR transcription highly dependent on the presence and location of the amino moiety. 9-Aminoacridine inhibits virus replication in HIV-1 infected cell lines. 9-Aminoacridine is used as a Rifampin (RIF; HY-B0272) adjuvant for the multidrug-resistant K. pneumoniae infections .
    9-Aminoacridine
  • HY-143285

    Fluorescent Dye Infection
    AMC-GlcNAc (compound 1) is a potent fluorogenic probe for detection and characterization of β-hexosaminidase enzyme activity. AMC-GlcNAc enables continuous monitoring by turn-on fluorescence and fluorescence signal is constant over a wide pH range (Ex=325 nm, Em=390 nm). AMC-GlcNAc enables ratiometric fluorescence detection with high sensitivity and low background, which can be used to screen for recombinant dispersin B activity in E. coli cell lysate .
    AMC-GlcNAc
  • HY-150086

    CF4

    Fluorescent Dye Others
    Copper Fluor-4 (CF4) is a Cu +-specific fluorescent probe based on a rhodol dye scaffold. Copper Fluor-4 has high copper selectivity with a Kd value of 2.9×10 −13 M, particularly over zinc and iron, as well as abundant cellular alkali and alkaline earth metals. Copper Fluor-4 is stable in a physiologically relevant pH regime between 6 and 8 (wavelengths of 415 nm for excitation and 660 nm for emission) .
    Copper Fluor-4
  • HY-110210

    BODIPY FL,SE

    Fluorescent Dye Others
    BODIPY FL NHS ester (BODIPY FL, SE) is a cell membranes-penatrable amine-reactive fluorescent probe. The maximum excitation/emission wavelength of the BODIPY-FL NHS ester are 502/511 nm, respectively. BODIPY-FL NHS ester has high stability and is insensitive to the polarity, pH and type of solvent, and can maintain stable fluorescence properties under different environmental conditions. BODIPY-FL NHS ester can be used for the synthesis of protease substrates, live cell imaging, protein labeling and immunoassay .
    BODIPY-FL NHS ester
  • HY-W800701

    Biochemical Assay Reagents Others
    BP Fluor 546 DBCO is an azide-reactive probe that can be used for imaging azide-tagged biomolecules via a copper-free click reaction. The DBCO moiety reacts with azides to form a stable triazole and does not require a Cu-catalyst or elevated temperatures. In applications where the presence of copper is a concern, BP Fluor 546 DBCO is an ideal alternative to copper-requiring fluorescent alkynes. BP Fluor 546 is a water-soluble, pH-insensitive (from pH 4-10), orange-fluorescent dye with absorption and emission maxima at 554 and 570 nm, respectively. It can be used with the 488 nm and 532 nm laser lines. BP Fluor 546 dye conjugates to a variety of antibodies, peptides, proteins, tracers, and amplification substrates, which are often used for generating stable signals in imaging and flow cytometry.
    BP Fluor 546 DBCO
  • HY-B1422R

    Bacterial HIV Infection
    9-Aminoacridine (Standard) is the analytical standard of 9-Aminoacridine. This product is intended for research and analytical applications. 9-Aminoacridine, a fluorescent probe, acts as an indicator of pH for quantitative determination of transmembrane pH gradients (inside acidic). 9-Aminoacridine is an antimicrobial. 9-Aminoacridine exerts its antimicrobial activity by interacting with specific bacterial DNA and disrupting the proton motive force in K. pneumoniae. 9-Aminoacridine is a HIV-1 inhibitor and inhibits HIV LTR transcription highly dependent on the presence and location of the amino moiety. 9-Aminoacridine inhibits virus replication in HIV-1 infected cell lines. 9-Aminoacridine is used as a Rifampin (RIF; HY-B0272) adjuvant for the multidrug-resistant K. pneumoniae infections .
    9-Aminoacridine (Standard)
  • HY-B1422S

    Aminacrine-13C6

    Bacterial HIV Isotope-Labeled Compounds Infection
    9-Aminoacridine-13C6 is the 13C-labeled 9-Aminoacridine(HY-B1422). 9-Aminoacridine, a fluorescent probe, acts as an indicator of pH for quantitative determination of transmembrane pH gradients (inside acidic). 9-Aminoacridine is an antimicrobial. 9-Aminoacridine exerts its antimicrobial activity by interacting with specific bacterial DNA and disrupting the proton motive force in K. pneumoniae. 9-Aminoacridine is a HIV-1 inhibitor and inhibits HIV LTR transcription highly dependent on the presence and location of the amino moiety. 9-Aminoacridine inhibits virus replication in HIV-1 infected cell lines. 9-Aminoacridine is used as a Rifampin (RIF; HY-B0272) adjuvant for the multidrug-resistant K. pneumoniae infections .
    9-Aminoacridine-13C6
  • HY-150175

    Fluorescent Dye Inflammation/Immunology
    HKSOX-1 and its derivatives (HKSOX-1r and HKSOX-1m) are novel fluorescent probes designed for highly sensitive and selective detection of the superoxide anion radical (O2 •−) in cellular environments. These probes utilize an aryl trifluoromethanesulfonate group that undergoes O2 •−-mediated cleavage, releasing a free phenol and emitting fluorescence. They demonstrate excellent specificity and sensitivity across various pH ranges, withstand interference from strong oxidants and reductants typical in cellular contexts. HKSOX-1r, optimized for cellular retention, has been effectively employed in diverse assays including confocal imaging, flow cytometry, and zebrafish embryo studies, highlighting its utility in investigating O2 •− roles in inflammation, mitochondrial stress, and other physiological processes .
    HKSOX-1
  • HY-131442
    Alkyne-phenol
    2 Publications Verification

    Alkyne tyramide; Alk-pH

    Biochemical Assay Reagents Others
    Alkyne-phenol (Alk-Ph) is a clickable ascorbate peroxidase 2 (APEX2) probe. Alkyne-phenol substantially improves APEX-labeling efficiency in intact yeast cells, as it is more cell wall-permeant than APEX2 substrate biotin-phenol (BP). Alkyne-phenol also facilitates the identification of APEX-labeling sites, allowing the unambiguous assignment of membrane topology of mitochondrial proteins . Alkyne-phenol is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    Alkyne-phenol
  • HY-125372

    ABAO

    Biochemical Assay Reagents Others
    2-Amino benzamidoxime (ABAO compound 6) can react quickly with aldehydes to form stable 1, 2-dihydroquinazoline 3-oxides in aqueous solutions. The 2-Amino benzamidoxime reaction process consists of the formation of a Schiff base as a rate-determining step, followed by rapid intramolecular cyclization. The reaction rate is dependent on pH, indicating that protonated benzamidoxime is involved in the formation of Schiff bases as an internal generalized acid. Substituents on the aromatic ring can increase the alkalinity of the aromatic amine, thus speeding up the reaction. The reactive properties of 2-Amino benzamidoxime make it a potential platform for the development of new bioconjugated strategies, fluorescent probes, and post-translational diversification of genetic coding libraries .
    2-Amino benzamidoxime
  • HY-15558
    Hoechst 33258
    Maximum Cited Publications
    15 Publications Verification

    bisBenzimide H 33258; H 33258

    Fluorescent Dye DNA Stain DNA Alkylator/Crosslinker Others
    Hoechst 33258 is a blue to blue-green fluorescent live cell dye that can label DNA. Hoechst 33258 can specifically bind to the minor groove of DNA (and tends to bind to A/T-rich DNA), resulting in a significant increase in fluorescence intensity. Hoechst 33258 can cross the cell membrane and cause changes in DNA structure, such as G2/M phase arrest. Hoechst 33258 can bind to live or fixed cells, and the fluorescence intensity increases with increasing solution pH. As a DNA-specific probe, Hoechst 33258 can be used to detect DNA content, analyze cell cycle, etc. The excitation wavelength of Hoechst 33258 is 350-365 nm, and the emission wavelength is 460-490 nm .
    Hoechst 33258

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