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[Chemical Knowledge]：The nature and use of the alcohol.

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Glycol, also known as 1,4-Butanediol (BDO), is an important organic chemical raw material. Its molecular formula is C4H10O2, structural formula is HOCH2CH2CH2CH2OH, colorless viscous oily liquid. Flammable, freezing point 20.1 ℃, melting point 20.2 ℃, boiling point 228 ℃,171 ℃(13.3kPa),120 ℃(1.33kPa),86 ℃(0.133kPa), relative density 1.0171(20/4 ℃), refractive index 1.4461. Flash point (open cup) 121 ℃. Miscible with water, miscible in ethanol, ether, etc. Can dissolve a variety of organic and inorganic substances. With hygroscopic, bitter taste.

of the nature of the main are:

1 colorless transparent oily liquid, flammable, hygroscopic, low odor.
2. Vapor pressure: 1.33kPa/120 ℃,0.133kPa/86 ℃.
3. Flash point: 121°C
4. Viscosity (20°C):6.6mPa.s.
5. Surface tension (25 ° C.):44.1 mN/m.
6. Refractive index (nD20):1.447~1.449.
7. Solubility: Soluble in water, methanol, ethanol, acetone, ether, etc.

is widely used in the production of plasticizers and stabilizers, tetrahydrofuran, gamma-butyrolactone, food-grade butanediol, 2-aminobutanol, etc., as well as solvents, fabric moisturizers, pesticide stabilizers, pharmaceutical intermediates, etc. In the field of medicine, it can be used in the production of various drugs, such as anti-tuberculosis drugs, anti-tumor drugs and so on. In addition, it can also be used in the production of cosmetics, coatings, adhesives and other products.

Specifically, the uses of the glycol include:

1. Plasticizer: The glycol can be used as a plasticizer in plastic processing, which can improve the flexibility, impact strength and processability of the plastic.
2. Stabilizer: It can be used as a heat stabilizer and a light stabilizer to prevent aging and degradation of plastic and rubber products during processing and use.
3. Solvent: The glycol has good solubility and can be used as a solvent in the production of coatings, inks, adhesives and other products.
4. Pharmaceutical intermediates: The glycol can be used in the production of various drugs, such as anti-tuberculosis drugs, anti-tumor drugs, etc.
5. Humectant: The glycol is hygroscopic and can be used as a humectant in cosmetics and textiles to keep the skin and fabrics moist.

In short, as an important organic chemical raw material, it has a wide range of applications in the field of chemical production raw materials.

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