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EC number: 284-892-9 | CAS number: 84989-04-8 The fraction of tar acid rich in 3- and 4-methylphenol, recovered by distillation of low-temperature coal tar crude tar acids.
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Tar acids, methylphenol fraction is a liquid at 20 °C and 1013 hPa. The melting point of tar acids, methylphenol fraction is <13 °C and the boiling point is 200.5 - 201.6 °C at 1013 hPa. The density of tar acids, methylphenol fraction is 1.04 g/cm3 at 20 °C. The vapour pressure of tar acids, methylphenol fraction is 44.8 - 70.4 Pa at 20 °C. The log Pow of tar acids, methylphenol fraction is between 1.5 and 2.5. The water solubility of tar acids, methylphenol fraction is 21 - 23 g/L at 25 °C. The flash point of tar acids, methylphenol fraction is ca. 103 °C at 100 kPa. The self-ignition temperature for tar acids, methylphenol fraction is 530 °C. The dissociation constant pKa of tar acids, methylphenol fraction is between 10.1 and 10.3. The dynamic viscosity of the liquid form of tar acids, methylphenol fraction is 16.6 - 18.1 mm2 s-1 at 20 °C.
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