CAS 100-84-5 corresponds to 3-methylanisole, which is a transparent to slightly yellow flammable liquid with the molecular formula C ₈ H ₁ O. It is mainly used as an organic intermediate in the synthesis of pharmaceuticals, dyes, and fragrances.

Core identification and physicochemical properties
-Chinese name: meta methyl benzyl ether (alias: 3-methoxytoluene, 3-methylbenzyl ether, meta methyl ether)
-English name: 3-Methylanisole (alias: m-Methoxytoluene, 1-Methoxy-3-methylbenzene)
-Molecular formula/weight: C ₈ H ₁₀ O/122.16
-Appearance: Transparent to slightly yellow liquid
-Key parameters: Boiling point 175-176 ° C, melting point -47 ° C, density 0.969 g/mL (25 ° C), flash point 54 ° C, refractive index 1.512-1.514
-Solubility: Insoluble in water, easily soluble in organic solvents such as ethanol and ether

Main applications and synthesis
-Application areas: mainly used for synthesizing dyes (such as thermosensitive/pressure-sensitive dye raw materials), pharmaceutical intermediates, and organic synthesis; Also used as a fragrance fixative for spices.
-Common preparation method: Alkylation reaction of meta cresol with dimethyl sulfate (or chloromethane/dimethyl carbonate) under alkaline conditions.

Safety and Storage
-Hazard: Flammable liquid (GHS category 3), harmful if swallowed; Incompatible with strong oxidants.
-Storage requirements: Seal and store in a cool and ventilated place (≤ 30 ° C), away from fire and heat sources, and avoid mixing with oxidants during storage.
-Transport code: UN 1993, packaging grade III.

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3-Methylanisole CAS 100-84-5
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