Rose's metal is a fusible alloy with a low melting point. It consists of 50% bismuth, 25–28% lead and 22–25% tin. Its melting point is between 94 and 98℃ (201 and 208°F). The alloy does not appreciably contract or expand on solidification, this characteristic being a function of its bismuth percentage, but does slightly contract on cooling.
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Rose's metal was used as the droplet fluid, because it has a low melting point (e460 K). Rose's metal is used as a sample in computer-controlled diffractometer.
