Understanding CAS Number 96-31-1 An Insight into Phenolphthalein
CAS number 96-31-1 corresponds to phenolphthalein, a widely used organic compound in various chemical, educational, and industrial applications. Known for its role as a pH indicator, phenolphthalein is particularly noteworthy for its color change characteristics, which make it indispensable in various fields of science and industry.
1. Chemical Structure and Properties
Phenolphthalein (C20H14O4) has a distinct molecular structure comprising a colorless, crystalline substance in its pure state. It displays unique properties, notably its reaction to pH changes. In acidic environments (pH < 7), phenolphthalein remains colorless, while in alkaline solutions (pH > 8), it transitions to a vibrant pink hue. This dramatic change occurs as the compound undergoes deprotonation, leading to the formation of a phenolate ion, which is responsible for the color appearance in basic solutions.
Phenolphthalein is predominantly utilized in laboratory settings as a pH indicator. It is commonly used in titration experiments to determine the acidity or basicity of various solutions. When a strong acid is titrated with a strong base, the point at which the solution changes color indicates the equivalence point of the reaction, allowing chemists to ascertain the concentration of the acids or bases involved.
In addition to its primary role as a pH indicator, phenolphthalein is also employed in other laboratory analyses, including estimating the hardness of water and determining the concentration of certain metal ions, further showcasing its versatility in chemical assessments.
3. Industrial Applications
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Beyond the laboratory, phenolphthalein finds applications in several industrial processes. For example, it is used in the manufacturing of dyes, plastics, and pharmaceuticals. Its utility in these areas is largely attributed to its chemical stability and readily observable change in color, which aids in monitoring processes.
In the pharmaceutical industry, phenolphthalein has been historically used as a laxative, although its use for this purpose has declined due to concerns over safety. Nonetheless, it continues to play a significant role in developing various medicinal compounds due to its chemical properties.
4. Safety and Environmental Considerations
Despite its useful applications, there are safety and environmental concerns associated with phenolphthalein. For example, prolonged exposure to high concentrations of this compound may cause skin and eye irritation. Additionally, as a potential endocrine disruptor, there are ongoing studies assessing its impact on human health and the environment. As with any chemical, proper handling and disposal protocols must be observed to mitigate risks associated with its use.
5. Conclusion
In conclusion, CAS number 96-31-1 or phenolphthalein is more than just a chemical compound; it is a vital component in various scientific and industrial applications. From its distinctive color-changing ability that assists in pH determination to its role in product manufacturing, phenolphthalein serves multiple functions that highlight its importance in chemistry and beyond. As we continue to explore its applications and effects, understanding compounds like phenolphthalein helps in fostering a safer and more effective use of chemicals in our daily lives and industries.
Whether in educational labs or in manufacturing facilites, phenolphthalein continues to exhibit its versatile utility, contributing to advancements in science, industry, and health. As research persists into its properties and uses, we can look forward to discovering new and innovative applications for this intriguing compound.