The difference between ortho-n-octyl ester and dioctyl ester

In the chemical industry, dioctyl phthalate and dioctyl phthalate are two common ester compounds, which are often used in the production of spices and fragrance. There are significant differences in structure, properties and applications. This article will analyze the differences between the two in detail from multiple aspects to help readers better understand their characteristics and their uses.

1. basic definition and structure

We need to clarify the definition of o-n-octyl ester and dioctyl ester. Ortho-n-octyl ester is a dibasic ester having the formula PhO-CO-O-C16H34-COPh, wherein "Ph" represents a phenyl group. "Dioctyl ester" is a simple dibasic ester, its structural formula is (C16H33O2)COPh.

Structurally, o-dioctyl ester has a symmetrical central dibasic ester group, while the central dibasic ester group of dioctyl ester is asymmetrical. This structural difference leads to significant differences in physical properties and chemical behavior.

2. PHYSICAL AND CHEMICAL PROPERTIES COMPARATIVE

1. solubility and density Both o-n-octyl ester and dioctyl ester have good solubility in water, but the solubility of dioctyl ester is slightly higher than that of o-phenyl, and the density of dioctyl ester is slightly higher. This difference is mainly related to their molecular structure.

2. Melting Point and Odor The melting point of ortho-n-octyl ester is higher, about 105°C, while the melting point of dioctyl ester is lower, about 80°C. Dioctyl ester has an obvious aromatic odor, while o-phthalate has a lighter odor.

3. Stability and Environmental Impact N-octyl phthalate is easily degraded under light and acidic conditions, but it is more stable under alkaline conditions. Dioctyl ester is less stable and easily degraded, and some intermediates in its production process may have potential impact on the environment.

3. application areas of comparison

In practical applications, the use of o-n-octyl ester and dioctyl ester is different. Ortho-n-octyl ester is mainly used in food, cosmetics and fragrance fields, because of its high stability, suitable for long-term storage. Dioctyl ester is mainly used in the soap industry, because of its good surface active properties.

4. advantages and disadvantages comparison

As can be seen from the above table, o-phthalic dioctyl ester and dioctyl ester have their own advantages and disadvantages. The choice of substance depends on the requirements of the specific application, as well as on cost, environmental impact and degradability.

5. summary

Through the above analysis, it can be seen that there are significant differences between o-n-octyl ester and dioctyl ester in structure, physical properties, application and stability. Understanding these differences helps us make the right choices in practical applications to achieve the best results.

Both o-n-octyl phthalate and dioctyl phthalate are esters, but they have their own specific application fields and advantages and disadvantages. The choice of which substance needs to be considered comprehensively according to specific needs.