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Chemical Name
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Thymolphthalein
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Synonyms
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3,3-bis(4-hydroxy-2-methyl-5-(1-methylethyl)phenyl)-1(3H)-Isobenzofuranone
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Molecular formula
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C28H30O4
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CAS No.
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125-20-2
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EINECS No.
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204-729-7
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Molecular weight
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430.54
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Molecular Structure
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Details
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Appearance: White or straw yellow powder
Melting point: 251.0~255.0
PH change range: 9.3(Colorless)--10.5(Blue)
Solubility in Ethanol: Passes test
Solubility in Sodium hydroxide: Passes test
Sulfated ash: 0.1%max
Solubility: insolve in water, solve in alcohol.
Packing: 25kg/ fibre drum
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Main Application
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Ph indicator, inspection, chromatographic analysis with reagents blood.
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Applications
Thymolphthalein is a remarkable chemical compound that plays a crucial role in numerous scientific and industrial processes. Our company is dedicated to providing top - notch Thymolphthalein, meeting the highest standards of quality and purity for our customers worldwide.
Chemical Characteristics
Thymolphthalein has the chemical formula
. It exists as a white to pale - yellow crystalline powder. This compound is insoluble in water but shows good solubility in ethanol and other organic solvents. Thymolphthalein has a distinct melting point range, typically around 250 - 252 °C. Its chemical structure endows it with unique properties that are highly beneficial in various applications.
Key Applications
In Acid - Base Titrations
One of the most well - known applications of Thymolphthalein is as an indicator in acid - base titrations. In a basic medium, Thymolphthalein turns blue, while in an acidic environment, it remains colorless. This sharp color change makes it an ideal choice for accurately determining the endpoint of titration reactions. Scientists and chemists rely on Thymolphthalein to perform precise chemical analyses in laboratories, ensuring the accuracy of results in fields such as pharmaceutical research, environmental analysis, and food and beverage quality control.
In pH Sensing
Due to its sensitivity to changes in pH, Thymolphthalein is also used in pH - sensing applications. It can be incorporated into pH - sensitive papers or sensors, allowing for quick and easy determination of the pH value of a solution. This is particularly useful in industries where maintaining the correct pH level is critical, such as in the manufacturing of cosmetics, where the pH of products affects their stability and skin compatibility.
In Educational Settings
Thymolphthalein is a popular teaching tool in educational institutions. Its vivid color change during acid - base reactions makes it an excellent visual aid for students learning about chemical reactions and the concept of pH. Teachers use Thymolphthalein in classroom experiments to engage students and help them better understand fundamental chemical principles.
Unparalleled Quality Assurance
Our production of Thymolphthalein adheres to the strictest quality control measures. We use advanced manufacturing techniques and state - of - the - art equipment in our production facilities. Each batch of Thymolphthalein undergoes rigorous testing in our in - house, ISO - certified laboratories. We analyze the product for its chemical purity, physical properties, and performance in relevant applications. By ensuring that our Thymolphthalein meets and exceeds international quality standards, we provide our customers with a reliable and consistent product.
Flexible Packaging and Swift Delivery
We understand that different customers have diverse requirements for packaging. Therefore, we offer Thymolphthalein in a variety of packaging options. Whether you need small quantities in vials for laboratory research or large - scale industrial - sized containers, we can accommodate your needs. Our efficient logistics network ensures that your order is shipped promptly and reaches you in perfect condition, regardless of your location. We strive to minimize delivery times and keep you informed about the status of your order throughout the shipping process.
If you are in search of a reliable supplier of high - quality Thymolphthalein for your research, industrial, or educational needs, our company is your best choice. Contact us today to learn more about our product offerings, pricing, and how we can support your specific projects.
What does thymolphthalein do?
Thymolphthalein is a pH indicator primarily used to detect alkaline conditions in chemical and biological experiments. It transitions from colorless (in neutral or acidic solutions) to blue (in basic solutions) around pH 9.3–10.5, making it ideal for titrations involving strong bases like sodium hydroxide. Beyond laboratory use, it has applications in educational demonstrations to visually illustrate pH changes and in some medical diagnostics. Its clear color shift provides a reliable visual endpoint in reactions where precise alkalinity measurement is required, such as soap manufacturing or water quality testing.
What colour does thymolphthalein turn in alkali?
In alkaline solutions (pH above ~10.5), thymolphthalein turns a distinctive deep blue color. This transition occurs due to the deprotonation of its molecule in high-pH environments, altering its light absorption properties. Below pH 9.3, it remains colorless, making it particularly useful for identifying the endpoint in base titrations. The vivid blue hue ensures easy visual confirmation of alkalinity, which is why it’s favored in experiments requiring clear, unambiguous pH indicators.
Why does thymolphthalein turn blue?
Thymolphthalein turns blue in alkaline conditions because its molecular structure changes when it loses hydrogen ions (deprotonation). This shift creates a conjugated system that absorbs light in the yellow-orange spectrum, causing the solution to reflect blue light. The intensity of the color depends on pH—weakly basic solutions may show a faint blue, while strongly alkaline solutions produce a vibrant shade. This property makes thymolphthalein a valuable tool for precise pH monitoring in chemistry and industry.
