| 1 | Coal tar spill pollutes Chongqin river. | |
| 2 | Besides, the development mode of coal tar enterprises was also discussed. | |
| 3 | Aniline : A coal tar derivative used in penetrating tints . | |
| 4 | Pitch and pitch coke, obtained from coal tar or from other mineral tars. | |
| 5 | Dark hair dyes: They are known to contain coal tar, a carcinogenic chemical. |
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