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| Product Name | Phenolphthalein (Reag. USP, Ph. Eur.) for analysis, ACS |
| CAS Number | 77-09-8 |
| Molecular Formula | C20H14O4 |
| Molecular Weight | 318.33 g/mol |
| Appearance | White to yellowish-white crystalline powder |
| Solubility | Soluble in alcohol and ether, slightly soluble in water |
| Storage Conditions | Store in a cool, dry place away from light |
| Usage | Commonly used as a pH indicator in analytical chemistry |
| Purity | ≥ 98% |
| Melting Point | 258-263°C |
| Boiling Point | not applicable |
| Density | 1.299 g/cm3 |
| Odor | Odorless |
| Flash Point | not applicable |
| Refractive Index | 1.622 |
| Stability | Stable under normal temperatures and pressures |
| Packaging | Available in various packaging sizes |
FAQ
What is Phenolphthalein (Reag. USP, Ph. Eur.) used for in analysis,
ACS?
Phenolphthalein (Reag. USP, Ph. Eur.) is commonly used in analytical chemistry for its pH indicator properties. It changes color depending on the pH of a solution, making it useful in titrations and other chemical analyses where pH needs to be monitored.
How does Phenolphthalein (Reag. USP, Ph. Eur.) work as a pH indicator?
Phenolphthalein (Reag. USP, Ph. Eur.) is colorless in acidic solutions and turns pink to violet in alkaline solutions. This color change is due to the dissociation of the phenolphthalein molecule at different pH levels, causing a shift in the absorption spectrum of the compound.
What are some common applications of Phenolphthalein (Reag. USP, Ph. Eur.) in analytical chemistry?
Phenolphthalein (Reag. USP, Ph. Eur.) is often used in acid-base titrations to determine the endpoint of a reaction based on the color change of the indicator. It is also used in complexometric titrations and other types of chemical analyses where pH is a critical parameter.
How should Phenolphthalein (Reag. USP, Ph. Eur.) be handled and stored in the laboratory?
Phenolphthalein (Reag. USP, Ph. Eur.) should be handled with care, as it is a chemical reagent. It should be stored in a cool, dry place away from sources of heat and light. When working with Phenolphthalein, proper safety equipment such as gloves and goggles should be worn to prevent skin contact or inhalation of the compound.
Can Phenolphthalein (Reag. USP, Ph. Eur.) be used in qualitative analysis experiments in educational settings?
Yes, Phenolphthalein (Reag. USP, Ph. Eur.) is commonly used in educational settings for qualitative analysis experiments to demonstrate acid-base reactions and pH indicators. It provides a visual cue for students to observe chemical changes during experiments, making it a valuable tool for teaching chemistry concepts.
Phenolphthalein (Reag. USP, Ph. Eur.) is commonly used in analytical chemistry for its pH indicator properties. It changes color depending on the pH of a solution, making it useful in titrations and other chemical analyses where pH needs to be monitored.
How does Phenolphthalein (Reag. USP, Ph. Eur.) work as a pH indicator?
Phenolphthalein (Reag. USP, Ph. Eur.) is colorless in acidic solutions and turns pink to violet in alkaline solutions. This color change is due to the dissociation of the phenolphthalein molecule at different pH levels, causing a shift in the absorption spectrum of the compound.
What are some common applications of Phenolphthalein (Reag. USP, Ph. Eur.) in analytical chemistry?
Phenolphthalein (Reag. USP, Ph. Eur.) is often used in acid-base titrations to determine the endpoint of a reaction based on the color change of the indicator. It is also used in complexometric titrations and other types of chemical analyses where pH is a critical parameter.
How should Phenolphthalein (Reag. USP, Ph. Eur.) be handled and stored in the laboratory?
Phenolphthalein (Reag. USP, Ph. Eur.) should be handled with care, as it is a chemical reagent. It should be stored in a cool, dry place away from sources of heat and light. When working with Phenolphthalein, proper safety equipment such as gloves and goggles should be worn to prevent skin contact or inhalation of the compound.
Can Phenolphthalein (Reag. USP, Ph. Eur.) be used in qualitative analysis experiments in educational settings?
Yes, Phenolphthalein (Reag. USP, Ph. Eur.) is commonly used in educational settings for qualitative analysis experiments to demonstrate acid-base reactions and pH indicators. It provides a visual cue for students to observe chemical changes during experiments, making it a valuable tool for teaching chemistry concepts.
