CPC C07C 43/23 (2013.01) [C07C 41/09 (2013.01); C07C 41/40 (2013.01); C07B 2200/13 (2013.01); C07C 2601/16 (2017.05)] | 8 Claims |
1. A stable crystalline form A of 2-tert-butyl-4-methoxyphenol, wherein: form A has a powder X-ray diffraction pattern expressed in 2θ angles using Cu-Kα radiation having absorption peaks selected from the following positions: 6.27±0.10, 6.94±0.10, 12.27±0.10, 13.36±0.10, 14.01±0.10, 14.79±0.10, 15.31±0.10, 17.05±0.10, 18.30±0.10, 19.00±0.10, 20.47±0.10, 20.98±0.10, 22.37±0.10, 23.68±0.10, 24.55±0.10, 25.37±0.10, 30.83±0.10, 33.12±0.10, 40.50±0.10, and 42.81±0.10.
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