Overview
Methanol, also known as methyl alcohol or wood alcohol, is the simplest alcohol with the chemical formula CH₃OH. It is a light, volatile, colorless, flammable liquid with a distinctive alcoholic odor similar to ethanol. Methanol is produced naturally in the anaerobic metabolism of many varieties of bacteria and is commonly produced industrially from the catalytic reaction of carbon monoxide and hydrogen. Methanol is a polar liquid at room temperature and is used as an antifreeze, solvent, fuel, and as a denaturant for ethanol. It is also used for producing biodiesel via transesterification reaction. Methanol is a precursor to acetic acid, methyl tert-butyl ether, dimethyl ether, and other important chemical compounds.
Physical and Chemical Properties
Methanol is a colorless, flammable liquid with a boiling point of 64.7°C and a melting point of -97.6°C. It has a density of 0.7918 g/cm³ at 20°C and is miscible with water and most organic solvents. The molecular weight of methanol is 32.04 g/mol, and it has a slight alcoholic odor. Methanol is highly flammable and can form explosive mixtures with air. It is toxic when ingested, inhaled, or absorbed through the skin. Methanol reacts violently with oxidizing agents, acids, and alkali metals. It is also a weak acid and can form salts with strong bases.
Main Applications
Methanol is a versatile chemical with a wide range of industrial applications. It is primarily used as a solvent in laboratories and industries, as well as an antifreeze in pipelines and windshield washer fluid. Methanol is also a key feedstock in the production of formaldehyde, acetic acid, and other chemicals. In the energy sector, methanol is used as a fuel for internal combustion engines and as a component in biodiesel production. It is also employed in the synthesis of plastics, paints, and adhesives. Additionally, methanol serves as a denaturant for ethanol, making it unfit for human consumption.
Safety and Storage
Methanol is highly toxic and poses significant health risks if ingested, inhaled, or absorbed through the skin. Exposure can lead to blindness, organ damage, or death. Proper personal protective equipment (PPE), including gloves, goggles, and respirators, should be used when handling methanol. Storage of methanol requires a cool, well-ventilated area away from ignition sources and incompatible materials such as oxidizing agents and strong acids. Containers should be tightly sealed and labeled clearly to prevent accidental exposure. Spills should be managed with absorbent materials and disposed of according to local regulations.
B2B Procurement Guide
When procuring methanol for industrial use, it is essential to source from reputable suppliers who provide certificates of analysis (CoA) to verify purity and quality. Methanol is commonly available in bulk quantities, such as tanker trucks or drums, with prices fluctuating based on market demand and crude oil prices. Buyers should consider transportation and storage logistics, ensuring compliance with safety regulations. It is advisable to establish long-term contracts with suppliers to secure stable pricing and supply. Additionally, verify that suppliers adhere to environmental and safety standards to mitigate risks associated with methanol handling.
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