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[Chemical Knowledge]：The difference between propylene glycol methyl ether and ethyl ether-let you know the difference between these two chemicals

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Propylene glycol methyl ether and ethyl ether are common chemicals that are widely used in many industries. Although they all belong to ether compounds and have certain similarities, there are some differences in physical and chemical properties and industrial applications.

differences in the physical and chemical properties of 1.:

1. different molecular structure:
propylene glycol methyl ether (referred to as PGME) of the chemical formula is C4H10O2, the molecular structure of two oxygen atoms and four carbon atoms. The chemical formula of ether (Et2O for short) is C4H10O, and there is only one oxygen atom and four carbon atoms in the molecular structure. It can be seen that propylene glycol methyl ether contains more oxygen atoms, and the molecular structure is relatively complex.

2. Difference between boiling point and freezing point:
PGME has a boiling point of about 162 ℃ and a freezing point of about -90 ℃. Ether has a boiling point of about 35°C and a freezing point of -116°C. It can be seen that the boiling point and freezing point of PGME are higher than that of ether, indicating that its melting point and boiling point are higher than that of ether.

3. Difference in density: The relative density of
PGME is about 1.03 g/ml and that of diethyl ether is about 0.71 g/ml. It can be seen that the density of PGME is higher than that of ether.

2. differences in industrial applications:

1. different uses:
PGME is mainly used in active mixtures, paints and detergents and other industries, with good solubility and volatility, can be used as organic synthetic solvents. Ether, on the other hand, is mainly used in pharmaceuticals, chemicals and laboratories, where it is often used as an anesthetic and solvent. Because ether has a good volatility, can quickly spread to the respiratory system, with anesthesia.

2. Different safety:
PGME has low toxicity, is relatively stable at room temperature, and is less irritating and carcinogenic to the human body. Ether is easy to explode under high temperature, open flame or organic acid, and has certain damage to the central nervous system of human body. Therefore, it is necessary to pay attention to safety when using.

To sum up, although propylene glycol methyl ether and ethyl ether are ether compounds, there are some differences in chemical structure, physical and chemical properties and applications. Understanding these differences can help us better select and use these two chemicals and avoid unnecessary risks and losses.

Note: The above content is for reference only. Users should carefully read the product manual in practical applications, and make judgments and operations according to specific conditions.