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| токсичное химическое вещество: 29 phrases in 13 subjects |
| Astronautics | 8 |
| Ecology | 3 |
| Energy industry | 2 |
| General | 1 |
| GOST | 1 |
| Material safety data sheet | 1 |
| Military | 2 |
| Nanotechnology | 2 |
| Occupational health & safety | 1 |
| Scientific | 1 |
| Technology | 3 |
| United Nations | 2 |
| Weapons of mass destruction | 2 |