What is the melting point of biphenyl?

The melting point of biphenyl, also known as diphenyl, is between 154 and 162 degrees Fahrenheit. There is some discrepancy due to different sources reporting different melting points under standard laboratory conditions, but the mean temperature is 158 degrees Fahrenheit.

As a solid, biphenyl is white and flaky, resembling leaflets or scales. As a liquid, it is used as a heat-transfer agent. It has a pleasant odor, and the scent is described as peculiar and buttery. Biphenyl is used in dye carriers, as a food preservative and to prevent fungi in the packing of citrus fruits. Exposure to high levels of biphenyl causes skin and eye irritation.