Date published: 2025-10-15

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pH Indicators

Santa Cruz Biotechnology now offers a broad range of pH Indicators for use in various applications. pH indicators are vital chemical compounds that change color in response to changes in pH, providing a visual representation of the acidity or alkalinity of a solution. In scientific research, these indicators are crucial for experiments requiring precise pH conditions, enabling researchers to maintain and verify the pH of environments in biochemical and chemical reactions. The utility of pH indicators extends across disciplines, including chemistry, environmental science, and molecular biology, where they serve as essential tools for monitoring reactions, studying enzyme activities, and investigating metabolic pathways. The ability to quickly assess pH values with indicators aids in the optimization of conditions for experimental protocols and ensures the reproducibility of results. These indicators are especially important in studies involving biochemical systems where pH can influence the activity and stability of molecules like proteins and nucleic acids. Advances in pH indicator technology have led to the development of more sensitive and selective indicators that can provide real-time, quantifiable data essential for detailed scientific analysis. The diversity of available pH indicators, each with unique transition pH ranges and colors, allows for their application in a variety of experimental scenarios, supporting a broad range of scientific inquiries. These compounds are integral to the toolkit of researchers aiming to explore and manipulate the chemical foundations of biological processes. View detailed information on our available pH Indicators by clicking on the product name.

Items 51 to 54 of 54 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Alizarin yellow GG

584-42-9sc-214521
25 g
$112.00
(0)

Alizarin yellow GG is a synthetic dye that exhibits remarkable pH sensitivity due to its unique azo structure, which facilitates protonation and deprotonation processes. This compound undergoes distinct colorimetric changes as pH varies, driven by the resonance stabilization of its conjugated system. Its solubility in aqueous and organic solvents, along with its capacity to form hydrogen bonds, contributes to its dynamic behavior in diverse chemical environments, making it a versatile indicator.

7-Hydroxy-4-methyl-3-coumarinylacetic acid

5852-10-8sc-210625
100 mg
$109.00
(0)

7-Hydroxy-4-methyl-3-coumarinylacetic acid is characterized by its ability to engage in specific hydrogen bonding interactions, influencing its acidity and solubility. The presence of the hydroxyl and carboxylic acid groups allows for effective proton transfer, leading to distinct pH-dependent behavior. Its unique coumarin structure enhances fluorescence properties, which can be modulated by changes in pH, making it an intriguing compound for studying molecular interactions in varying environments.

Patent blue V sodium salt

20262-76-4sc-250653
sc-250653A
10 g
25 g
$41.00
$66.00
(0)

Patent blue V sodium salt exhibits unique chromatic properties due to its sulfonate groups, which enhance solubility in aqueous environments. Its structure allows for strong ionic interactions, influencing its behavior in different pH conditions. The compound's distinct absorption spectrum shifts with pH changes, providing insights into molecular dynamics. Additionally, its stability in various ionic strengths makes it a subject of interest for studying reaction kinetics and environmental interactions.

Propyl red

2641-01-2sc-236489
5 g
$116.00
(0)

Propyl red is a pH indicator characterized by its vivid color transition, which occurs in response to changes in acidity. Its molecular structure features a conjugated system that allows for effective electron delocalization, resulting in distinct colorimetric shifts. The compound's sensitivity to protonation and deprotonation processes enables it to serve as a reliable marker for pH variations. Furthermore, its hydrophobic regions contribute to unique solubility behaviors in different solvents, influencing its reactivity and interaction with other chemical species.