Date published: 2025-10-20

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Phthaleins

Santa Cruz Biotechnology now offers a broad range of phthaleins for use in various applications. Phthaleins are a group of organic compounds commonly known for their vibrant colors, which make them valuable as pH indicators in chemical analysis and laboratory experiments. These compounds are synthesized through the reaction of phthalic anhydride with phenols, resulting in a class of molecules characterized by their distinctive structural frameworks. In scientific research, phthaleins are crucial for studying chemical equilibria, reaction mechanisms, and the properties of various substances under different pH conditions. Beyond their role as indicators, phthaleins also serve as intermediates in the synthesis of dyes, pigments, and polymers, making them indispensable in materials science and industrial chemistry. Their unique optical properties allow researchers to visualize and quantify chemical processes, thus providing a deeper understanding of molecular interactions and behaviors. The versatility of phthaleins extends to fields such as environmental science, where they are used to detect pollutants and assess water quality. By leveraging the distinctive features of phthaleins, scientists can innovate and improve analytical techniques, contributing to advancements in both basic and applied sciences. View detailed information on our available phthaleins by clicking on the product name.

Items 11 to 16 of 16 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Chlorophenol Red

4430-20-0sc-206022
10 g
$112.00
(0)

Chlorophenol Red is a dynamic pH indicator known for its vivid color shift from yellow to red, which occurs within a specific pH range. Its molecular structure, featuring a phenolic group, enables efficient proton transfer, leading to swift color changes in response to acidity. The compound's unique electron delocalization enhances its optical properties, while its hydrophilic and hydrophobic characteristics allow it to interact effectively with various solvents, influencing its reactivity and stability in different environments.

Pyrogallol Red

32638-88-3sc-215766
sc-215766A
1 g
5 g
$207.00
$513.00
(1)

Pyrogallol Red is a versatile pH indicator characterized by its striking color transition from yellow to red, which occurs within a defined pH range. Its unique molecular structure, featuring multiple hydroxyl groups, facilitates strong hydrogen bonding and enhances its solubility in aqueous solutions. This compound exhibits notable stability and reactivity due to its ability to undergo tautomerization, influencing its colorimetric properties and making it sensitive to changes in acidity.

Phenolphthalein Glucuronide, Sodium Salt

6820-54-8sc-286651
sc-286651A
sc-286651B
sc-286651D
sc-286651C
10 mg
25 mg
100 mg
250 mg
1 g
$135.00
$230.00
$640.00
$1304.00
$3850.00
(0)

Phenolphthalein Glucuronide, Sodium Salt is a distinctive phthalein derivative known for its unique chromogenic behavior. Its structure allows for specific interactions with various ions, leading to a pronounced color shift in response to pH changes. The compound's solubility in polar solvents enhances its reactivity, while its glucuronide moiety contributes to its stability and potential for selective binding. This results in distinct kinetic profiles during acid-base reactions, making it an intriguing subject for further study.

Phenol Red Sodium Salt

34487-61-1sc-206017
sc-206017A
5 g
25 g
$32.00
$92.00
2
(0)

Phenol Red Sodium Salt is a notable phthalein indicator characterized by its vibrant color transition across a pH range. Its molecular structure facilitates strong hydrogen bonding with water, enhancing its solubility and reactivity. The compound exhibits unique electrochemical properties, allowing it to participate in rapid equilibrium shifts during acid-base reactions. This dynamic behavior, coupled with its distinct spectral characteristics, makes it a fascinating compound for exploring pH-dependent processes.

Bromothymol blue sodium salt

34722-90-2sc-206018
sc-206018A
sc-206018B
10 g
25 g
100 g
$68.00
$142.00
$246.00
1
(0)

Bromothymol blue sodium salt is a distinctive pH indicator known for its striking color change from yellow to blue within a specific pH range. Its unique molecular structure allows for effective resonance stabilization, influencing its spectral properties. The compound engages in reversible protonation, leading to swift shifts in equilibrium during acid-base interactions. Additionally, its hydrophobic regions contribute to selective binding with protons, enhancing its sensitivity in various environments.

Thymolphthalexon

62698-55-9sc-237106
sc-237106B
sc-237106A
sc-237106C
sc-237106D
1 g
2 g
5 g
10 g
25 g
$138.00
$185.00
$362.00
$576.00
$1127.00
(0)

Thymolphthalexon is a notable phthalein characterized by its unique chromogenic properties, exhibiting distinct color changes in response to pH variations. This compound undergoes reversible protonation, leading to significant alterations in its electronic structure and light absorption characteristics. Its hydrophobic nature influences solubility and interaction with various solvents, while its structural rigidity contributes to its stability in diverse chemical environments, making it a valuable tool in analytical chemistry.