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Purification of Laboratory Chemicals, 8th Edition by W.L.F. Armarego

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1,3,5-Trichlorobenzene [108-70-3] C6H3Cl3, M 181.5, m 62-65°, 63°, 64°, 64-65°, 208°/740mm. Recrystallise it from dry *benzene or toluene. [Beilstein 5 IV 666.]

3,4,5-Trichloro -o- cresol (3,4,5-trichloro-2-methylphenol) [608-92-4] C7H5Cl3O, M 211.5, m 77°, pKEst ~ 7.6. Crystallise the cresol from petroleum ether.

2,3,5-Trichloro-p-cresol (2,3,5-trichloro-4-methylphenol) [608-91-3] has m 66-67°, pKEst ~ 6.9. Crystallise the cresol from petroleum ether. [Datta & Mitter J Am Chem Soc 41 2028 1919, DOI: 10.1021/ja02233a020; Beilstein 6 I 204.]

2,4,5-Trichloro-1-nitrobenzene (1,2,4-trichloro-5-nitrobenzene) [89-69-0] C6H2Cl3NO2, M 226.5, m 52-57°, 57°, 288°/740mm, d25 1.79g/ml. Crystallise it from EtOH. Its solubility in H2O is 0.27w/v% at 20°. ...

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