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The registered substance PR 254 is at 20°C a red powder with a weak odour. It does not melt up to 300°C.

PR 254 has a relative density of 1.58 at 20 °C and a mass median diameter of 13.2 µm. It is has a water solubility < 0.1 mg/L and a log Kow of 2.4. PR254 neither self-ignites, nor is it flammable or explosive, nor does it have oxidising properties. It is considered to be stable in organic solvents.