For chemists and material scientists, understanding the precise chemical properties of compounds is fundamental to their successful application. 3-Methoxyphenylacetic Acid, identified by its CAS number 1798-09-0, is a compound that plays a significant role as a chemical intermediate. This article will explore its key chemical properties and highlight its primary uses in various industrial and research settings, providing valuable insights for those looking to purchase or utilize this substance.

Understanding the Chemical Identity
3-Methoxyphenylacetic Acid, with the chemical formula C9H10O3, has a molecular weight of 166.17 g/mol. It is commonly described as an off-white solid, indicating its physical state at room temperature. A critical parameter for its handling and reaction planning is its melting point, which typically falls within the range of 65-69 °C. This well-defined melting point is a key indicator of its purity and stability. The compound also features a specific gravity of approximately 1.1708 (though this is an estimate) and a refractive index estimated at 1.5500.

Reactivity and Functional Groups
The structure of 3-Methoxyphenylacetic Acid incorporates both a carboxylic acid group (-COOH) and a methoxy-substituted benzene ring. The carboxylic acid group is reactive and can undergo typical reactions such as esterification, amidation, and reduction to alcohols. The presence of the aromatic ring with an activating methoxy group makes it susceptible to electrophilic aromatic substitution reactions at specific positions. These functional group characteristics are what make it a valuable intermediate, enabling chemists to build more complex molecular structures. Researchers often buy this compound for its potential in these transformations.

Key Applications as a Chemical Intermediate
The primary application of 3-Methoxyphenylacetic Acid is as a chemical intermediate in the synthesis of various organic compounds. It is particularly sought after in the pharmaceutical industry as a building block for active pharmaceutical ingredients (APIs). Its structure lends itself to being incorporated into molecules designed for therapeutic purposes. Beyond pharmaceuticals, it finds use in the synthesis of agrochemicals, specialty polymers, and other fine chemicals. The demand for high-purity 3-Methoxyphenylacetic Acid, often specified at 97% minimum purity, is high among manufacturers and research institutions that require reliable and consistent quality for their synthesis processes.

Sourcing and Quality Considerations
When sourcing 3-Methoxyphenylacetic Acid, it is important to engage with reputable manufacturers and suppliers who can guarantee the specified purity and provide comprehensive technical documentation. Companies often look for suppliers in regions like China, known for their robust chemical manufacturing capabilities and competitive pricing. Understanding the supplier's quality control measures and their ability to deliver consistently are key factors in establishing a strong procurement partnership. Whether for large-scale manufacturing or small-scale research, ensuring the quality of this intermediate is paramount.

Conclusion
3-Methoxyphenylacetic Acid (CAS 1798-09-0) is a chemically versatile compound with a well-defined set of properties that make it an invaluable intermediate in organic synthesis. Its applications span critical sectors like pharmaceuticals and fine chemicals, underscoring its importance in the modern chemical industry. By understanding its chemical nature and sourcing it from quality-assured manufacturers, researchers and producers can effectively leverage its potential to create innovative products.