| 摘要 |
Perylenetetracarboxylic acid-bis-(3,5-dimethylphenyl)imide in a novel gamma -modification characterized by an X-ray diffraction spectrum exhibiting very strong lines at interplanar spacings of 8.3, 3.61, 3.46 and 3.30 A, and strong lines at interplanar spacings of 17.2, 10.3, 7.2, 6.7 and 4.09. The pigment is suitable for dyeing high-molecular organic material. Compared with the known yellowish-red modifications, the gamma -modification is characterized by a bluish-red shade.
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