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Particulate matter (PM) was categorized into PM2.5 and PM10 based on its size. Many studies have proofed that tin soldering process generates aerosol in PM2.5 and PM10 category. This solder device is familiar and usually used in home repairs, industrial production sites, and school laboratories. The paper discusses physical and chemical properties of rosin fume which was originated from solder flux heating. The physical and chemical properties of the rosin fume such as particle size, PM2.5 mass concentration, FTIR characterization, SEM and EDX characterization. The size and mass concentration characterization were evaluated using calibrated PM sensor (Honeywell, HPMA115S0-XXX). It was found that PM2.5 mass concentration may reach 650 μg/m3 at 289 °C solder temperature. Whereas, the FTIR spectra (Bruker, Alpha), SEM and EDX were used to analyze the chemical composition and the morphology of the tin wire aerosol which were previously captured by an aerosol sampler.