Prepn from phenol and dimethyl sulfate: Ullmann, Ann. 327, 114 (1903); Graebe, Ann. 340, 204 (1905); G. S. Hiers, F. D. Hager, Org. Synth. coll. vol. I, 58 (2nd ed., 1941); from bromobenzene: Agfa, DE 411052; Chem. Zentralbl. 1925, I, 2411; Frdl. 15, 193; by passing methyl chloride into a suspension of sodium phenolate in liquid ammonia: White et al., J. Am. Chem. Soc. 46, 965 (1924); from phenol, methyl iodide and potassium carbonate in dimethylformamide: Brieger et al., J. Chem. Eng. Data 13, 581 (1968). Forms oils or resins by condensation with formaldehyde: DE 403264; DE 406152; Chem. Zentralbl. 1925, I, 307, 1816; Frdl. 14, 626, 627. Absorption spectrum: Scheibe, Ber. 59, 2625 (1926). Soly in glycerol, see McEwen, J. Chem. Soc. 123, 2285 (1923). Toxicity studies: J. M. Taylor et al., Toxicol. Appl. Pharmacol. 6, 378 (1964).