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ORGANIC - MOST IMPORTANT SUBSTANCES Methane (CH4): Utility: Fuel gas widely used for heating and power generation. Propane (C3H8) + Butane (C4H10): Utility: Liquefied petroleum gases (LPG) used as fuel in domestic heating and in vehicles. Octane (C8H18): Utility: Main component of gasoline, used as fuel in internal combustion engines. Ethene (C2H4): Utility: Raw material in the production of plastics such as polyethylene. Ethyne (C2H2): Utility: Used in welding and cutting processes, in addition to being a raw material for the synthesis of chemical products. Benzene (C6H6): Utility: Raw material in the production of many organic compounds, including plastics and resins. Ethanol (C2H5OH): Utility: Alcohol consumed in alcoholic beverages and used as biofuel. Glycerol (C3H8O3): Use: Component of many products, including soaps, cosmetics and pharmaceuticals. Phenol (C6H5OH): Use: Used in the production of plastics, resins and as an antiseptic. Acetic Acid (C2H4O2): Use: Widely used in the production of vinegar and as a solvent. Benzoic Acid (C7H6O2): Use: Food preservative and precursor in the synthesis of other organic compounds. Fatty Acids These are carboxylic acids with long hydrocarbon chains and can be saturated or unsaturated. Esters Esters are well known for their use as flavorings in processed foods, that is, substances that simulate the characteristic flavor and aroma of natural foods, such as fruits. In addition, esters are also used in the manufacture of medicines, cosmetics, perfumes and waxes. Triglycerides are a form of lipid (fat) composed of three fatty acid molecules linked to a glycerol molecule. They represent the main form of energy storage in organisms, being found in adipose tissue (fat) and also circulating in the blood. Ethyl Ether (C4H10O): Use: Solvent in pharmaceutical products and anesthetic. Acetone (C3H6O): Use: Common solvent, used in cleaning products and nail polish removers.