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| Name | Phenolphthalein (Reag. USP, Ph. Eur.) for analysis, ACS product |
| Appearance | White to yellowish-white crystalline powder |
| CAS Number | 77-09-8 |
| Molecular Formula | C20H14O4 |
| Molecular Weight | 318.33 g/mol |
| Solubility | Practically insoluble in water, soluble in alcohol and ether |
| Melting Point | 258 - 263°C |
| Boiling Point | Not applicable |
| Density | 1.299 g/cm3 |
| Purity | Min. 98.5% |
| Storage Conditions | Store in a cool, dry place away from light |
| Uses | Indicator in acid-base titrations, pH indicator, colorimetric reagent |
| Synonyms | Dinaphthophenolphthalein, 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone |
| Handling Precautions | Avoid inhalation, ingestion, and skin contact |
| Shelf Life | At least 2 years |
FAQ
What is Phenolphthalein (Reag. USP, Ph. Eur.) and its common
applications?
Phenolphthalein is a widely used chemical compound in analytical chemistry, specifically in acid-base titrations. It is employed as an acid-base indicator due to its color-changing properties at different pH levels. The compound appears colorless in acidic solutions and turns pink in basic solutions. It is commonly used in laboratories for the determination of endpoint in titrations and in various analytical procedures.
How does Phenolphthalein (Reag. USP, Ph. Eur.) meet the standards for analysis, ACS?
Phenolphthalein adheres to the standards set by the United States Pharmacopeia (USP) and the European Pharmacopoeia (Ph. Eur.) for its purity and quality. As an Analytical Chemistry Society (ACS) reagent, it undergoes rigorous testing to ensure its suitability for use in analytical procedures. The compound must meet specific criteria regarding purity, composition, and performance to be classified as ACS grade.
What are the advantages of using Phenolphthalein (Reag. USP, Ph. Eur.) for analysis in the laboratory?
Phenolphthalein offers several advantages when used for analysis in the laboratory. Its color change at the endpoint makes it easy to detect and determine the completion of titrations accurately. The compound is stable and reliable, providing consistent results in various analytical applications. Additionally, its availability in ACS grade ensures high purity and quality, making it a preferred choice for analytical chemists.
How should Phenolphthalein (Reag. USP, Ph. Eur.) be handled and stored in the laboratory?
Phenolphthalein should be handled with care in the laboratory to prevent any accidental exposure or contamination. It is recommended to wear appropriate personal protective equipment, such as gloves and goggles, when handling the compound. Additionally, Phenolphthalein should be stored in a cool, dry place away from direct sunlight and incompatible substances. Proper labeling and segregation from other chemicals are essential to avoid any mix-ups or cross-contamination.
Are there any precautions or considerations to keep in mind when using Phenolphthalein (Reag. USP, Ph. Eur.) in analytical procedures?
When using Phenolphthalein in analytical procedures, it is essential to follow standard laboratory practices and protocols. Ensure that the compound is properly dissolved and mixed in the solution for accurate results. It is advisable to use the appropriate concentration of Phenolphthalein as recommended for the specific analysis. Also, discard any expired or degraded solutions to maintain the reliability and effectiveness of the compound in analytical testing.
Phenolphthalein is a widely used chemical compound in analytical chemistry, specifically in acid-base titrations. It is employed as an acid-base indicator due to its color-changing properties at different pH levels. The compound appears colorless in acidic solutions and turns pink in basic solutions. It is commonly used in laboratories for the determination of endpoint in titrations and in various analytical procedures.
How does Phenolphthalein (Reag. USP, Ph. Eur.) meet the standards for analysis, ACS?
Phenolphthalein adheres to the standards set by the United States Pharmacopeia (USP) and the European Pharmacopoeia (Ph. Eur.) for its purity and quality. As an Analytical Chemistry Society (ACS) reagent, it undergoes rigorous testing to ensure its suitability for use in analytical procedures. The compound must meet specific criteria regarding purity, composition, and performance to be classified as ACS grade.
What are the advantages of using Phenolphthalein (Reag. USP, Ph. Eur.) for analysis in the laboratory?
Phenolphthalein offers several advantages when used for analysis in the laboratory. Its color change at the endpoint makes it easy to detect and determine the completion of titrations accurately. The compound is stable and reliable, providing consistent results in various analytical applications. Additionally, its availability in ACS grade ensures high purity and quality, making it a preferred choice for analytical chemists.
How should Phenolphthalein (Reag. USP, Ph. Eur.) be handled and stored in the laboratory?
Phenolphthalein should be handled with care in the laboratory to prevent any accidental exposure or contamination. It is recommended to wear appropriate personal protective equipment, such as gloves and goggles, when handling the compound. Additionally, Phenolphthalein should be stored in a cool, dry place away from direct sunlight and incompatible substances. Proper labeling and segregation from other chemicals are essential to avoid any mix-ups or cross-contamination.
Are there any precautions or considerations to keep in mind when using Phenolphthalein (Reag. USP, Ph. Eur.) in analytical procedures?
When using Phenolphthalein in analytical procedures, it is essential to follow standard laboratory practices and protocols. Ensure that the compound is properly dissolved and mixed in the solution for accurate results. It is advisable to use the appropriate concentration of Phenolphthalein as recommended for the specific analysis. Also, discard any expired or degraded solutions to maintain the reliability and effectiveness of the compound in analytical testing.
