ph indicator

Phenol Red (Sulfonphthal) is a pH indicator, red dye, and diagnostic aid for measurement of renal function. It is used also for researches of the gastrointestinal and other systems.

Bromophenol Blue, an acid phthalein dye, is utilized both as a tracking dye for electrophoresis and as a pH indicator with a transition range of pH 3 to 4.6.

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.

Neutral red is a vital dye, is used as an indicator and biological stain.

Acid Yellow 36 (Metanil Yellow) is an azo dye and pH indicator, changing color from red at pH 1.2 to yellow at pH 2.3.

α-Naphtholbenzein, also known as p-Naphtolbenzein, is a dye that serves as a pH indicator, exhibiting a color change from yellow at a pH of 0-8.2 to turquoise at a pH of 10. It is commonly employed in the sequential injection analysis technique for acid-base titrations [1].

Hydroxy naphthol blue disodium, an azo dye and metal indicator for calcium as well as a colorimetric reagent for alkaline earth metal ions (λmax = 650 nm), exhibits a reddish-pink color in calcium ion solutions at pH 12 to 13 and transitions to deep blue when disodium EDTA is introduced [1].

OG 488, a fluorescent pH indicator (acid), is widely used in biochemistry and neurosciences, offering numerous applications.

5(6)-Carboxynaphthofluorescein, a pH-dependent fluorophore, exhibits high sensitivity in alkaline pH settings, making it suitable for the development of fiber-optic pH sensors. Additionally, it serves as a fluorescent pH indicator with excitation emission wavelengths of 593 668 nm [1].

Nitrazine Yellow (Nitrazine Paper; Phenaphthazine) serves as a pH indicator that transitions in color from yellow to blue over a pH range of 6.0 to 7.0. This compound, a type of biological material or organic compound, is extensively utilized in life science research.

Acid blue is a dark bluish synthetic triphenylmethane dye. It used as a food coloring. The color of the dye is pH-dependent. The structure is also redox-sensitive, changing from a reduced yellow form to an oxidized red form in solution. It is usable as a

BCECF-AM, a compound permeable to cell membranes, serves as a fluorescent indicator for monitoring intracellular pH levels.

Cresol Red is an anionic dye utilized as a pH indicator, changing from orange at pH 1.8 to yellow at pH 2.0, and from yellow at pH 7.0 to purple at pH 8.8.

Ethyl red (Diethyl red) is a pH indicator.

Fluorescein O-methacrylate (Methacryloyloxy fluorescein) is a pH-sensitive dye characterized by fluorescent monomer properties with an excitation spectrum at 490nm and an emission spectrum at 520nm. It serves as an indicator and is noted for its minimal negative charge, biocompatibility, non-toxicity, and good dispersibility in aqueous solutions.

Aminacrine hydrochloride is a highly fluorescent anti-infective dye. It is also used as an intracellular pH indicator.

Bromocresol Purple (sodium), commonly referred to as Bromocresol Purple, is a sodium salt of bromocresol purple. This water-soluble dye functions as a pH indicator, transitioning in color from yellow to purple between pH 5.2 and 6.8.

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

3,6-diacetoxy Phthalonitrile is a fluorescent probe for monitoring intracellular pH by flow cytometry in living cells. It rapidly crosses cell membranes and is cleaved by cytosolic esterases to form the fluorescent pH indicator 2,3-dicyano-hydroquinone (DCH), which is excited at UV wavelengths. DCH can be excited at 351 nm, with pH-dependent emission in the range of 450-476 nm (pH 5.0-10.0) using a potassium-based buffer.

Ethyl Orange (sodium), indicator grade is an organic azo compound utilized as a pH indicator within the range of pH 3.0 to pH 4.8, where it transitions from red to orange in color.

7-Hydroxy-4-methylcoumarin-3-acetic acid is a blue fluorophore with pH-dependent and environmentally sensitive fluorescence that is widely used to label peptides, nucleotides, and carbohydrates, and also as a pH indicator.

BCECF is a pH-sensitive fluorescent dye and a cytosolic pH indicator. It can be used for detecting intracellular pH levels.

Bromocresol Green, a triphenylmethane dye, serves primarily as a pH indicator transitioning from yellow (λmax=435 nm, protonated form) at pH 4.15 to blue (λmax=615 nm, deprotonated form) in alkaline environments. Utilized in biochemical analysis, it quantifies serum protein and albumin, assesses creatinine concentration, and evaluates cell viability [1] [2] [3] [4]. The dye exhibits a bio-based, yellow-green to blue-green hue.

Phenol Red sodium salt is a water-soluble pH indicator used in the range from 6.8 (yellow) to 8.2 (red).