Chemistry teaching aids high quality derivatives of coal
Coal and it's derivatives, 15 labeled samples:
1. Bituminous coal
2. Coke gas
3. Coke
4. Ammoniac water
5. Mineral fertilizers
6. Pitch
7. Benzol
8. Coal tar
9. Naphthalene
10.Toluol
11. Dyestuff
12. Aniline
13. Saccharine
14. Phenol
15. Plastic
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