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Ethyl acetate and methyl formate are common organic compounds widely used in industry and scientific research. Ethyl acetate, with the chemical formula C4H8O2, is a colorless liquid at room temperature and has a fruity aroma. 

It is an important industrial solvent and chemical raw material. Methyl formate, with the chemical formula C2H4O2, is also a colorless liquid and has important applications in organic synthesis and pharmaceutical industry. First, let's take a look at the chemical structures of both. The molecule of ethyl acetate contains two acetate groups (CH3COO -), while the molecule of methyl formate contains one formate group (HCOO -). This structural difference leads to significant differences in properties and applications between the two. Ethyl acetate has good solubility and volatility, and is commonly used as an organic solvent and paint additive. 

Methyl formate is commonly used in organic synthesis and pesticide manufacturing, with good stability and reactivity. In addition, the combustion performance of the two is also different. Ethyl acetate has a higher combustion heat and is often used as a fuel additive, while methyl formate has a more stable combustion performance. In industry, ethyl acetate and methyl formate have their own application areas. Ethyl acetate is mainly used in industries such as inks, adhesives, plastics, and coatings, while methyl formate is commonly found in fields such as pharmaceuticals, pesticides, spices, and coatings. 

Overall, there are significant differences in chemical structure, properties, and applications between ethyl acetate and methyl formate, and suitable materials can be selected according to specific needs.