**IUPAC Name of CH3COOCH3: Methyl Acetate**

Methyl acetate is an organic compound with the chemical formula CH3COOCH3. It is commonly known by its IUPAC name, which is derived from the systematic naming rules set by the International Union of Pure and Applied Chemistry (IUPAC). Let's break down the IUPAC name of CH3COOCH3 and explain it in detail.

**1. Functional Group: Acetate**
The IUPAC name begins with the identification of the functional group present in the compound. In this case, the functional group is called "acetate." Acetate is a group of atoms consisting of two oxygen atoms (O) bonded to a central carbon atom (C), with one of the oxygen atoms also bonded to a hydrogen atom (H). The molecular formula of acetate is C2H3O2.

**2. Substituent: Methyl**
The second part of the IUPAC name describes any substituents or side groups attached to the functional group. Here, we have a methyl group attached to the acetate functional group. A methyl group consists of three hydrogen atoms bonded to a carbon atom (CH3-).

**3. Naming Order: Alphabetical**
According to IUPAC rules, when there are multiple substituents, they are named in alphabetical order. In the case of methyl acetate (CH3COOCH3), the methyl group is listed first because "m" comes before "o" in the alphabet. The acetate group is named second.

**4. Ester Nomenclature**
Methyl acetate is classified as an ester because it is formed by the reaction between an alcohol and an acid. In this case, methanol (CH3OH) and acetic acid (CH3COOH) react to form methyl acetate (CH3COOCH3). The name "acetate" indicates the presence of the acetic acid component in the molecule.

**5. Overall IUPAC Name: Methyl Acetate**
By combining all the above information, the IUPAC name for CH3COOCH3 is "methyl acetate." This name accurately describes the composition of the compound, with the methyl group as the substituent and the acetate group as the functional group.

In summary, CH3COOCH3 is named methyl acetate according to IUPAC nomenclature rules. Understanding the IUPAC name helps chemists to precisely identify and communicate the structure of organic compounds.